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STANLEY Classic 99 Utility Knife, Retractable, 6-Inch, (10-099)

4.3 4.3 out of 5 stars 2,391 ratings

Material Bamboo
Brand Stanley
Color 10-099
Item Length 6 Inches
Handle Material Metal
Blade Material Carbon Steel
Item Weight 50 Grams
Blade Length 2.43 Inches
Style Straight
Handle Type Manual-Retractable

About this item

  • Interlocking nose to hold blade securely
  • Three-position retractable blade
  • Blade storage in handle,Blade is stored inside the the body of the knife.
  • Multi-position blade slide
  • Includes three 11-921 Heavy Duty utility blades
  • Starts sharper and stays sharper than standard heavy-duty blades
  • 3-position, retractable blade; blade storage in handle

Customer ratings by feature

Easy to hold
4.1 4.1
Durability
3.9 3.9
Ergonomic
3.8 3.8
Light weight
3.8 3.8

From the manufacturer


About STANLEY

or over 170 years, STANLEY has been synonymous with quality, reliability, innovation and value. From the “do-it-yourselfer” installing a ceiling fan to the professional contractor framing new homes, it’s a safe bet that Stanley has the right tool for the job. We’re proud of our reputation for excellence, and dedicated to continually testing, designing and improving our products to ensure quality and maximum function. Maintaining our standing of being the world's best at what we do is important to us and what you expect from a name like STANLEY.

STANLEY 10-099 6-Inch Classic 99 Retractable Utility Knife

If flexibility is what you need, the Classic 99 6 Inch Retractable Utility Knife delivers. It has a three-position retractable blade made of carbon alloy steel that can handle all types of professional and home improvement jobs.

  • Interlocking nose to hold blade securely
  • Three-position retractable blade
  • Blade storage in handle
  • Interlocking nose to hold blade securely
  • Three-position retractable blade
  • Blade storage in handle
  • Multi-position blade slide
  • Furnished with three 11-921 Heavy Duty utility blades

Looking for specific info?

Product Description

Product Description

If flexibility is what you need, the Classic® 6" Retractable Utility Knife delivers. It has a three-position retractable blade made of carbon alloy steel that can handle all types of professional and home improvement jobs.

Amazon.com

The Stanley 6-Inch Classic 99 Retractable Utility Knife starts sharper and stays sharper than standard heavy-duty blades. This knife features a patented interlocking nose to hold the blade securely. The three-position, retractable blade can be stored in the handle. This knife includes three blades and comes with Stanley's limited lifetime warranty.

Everyone knows the importance of the right tool for the job. Stanley's "Application Specific Blades" are designed with unique features for cutting drywall, roofing shingles and paper. Each blade is constructed of carbon alloy steel. With Stanley's patented S3 Technology, paper blades start sharper and stay sharper, roofing blades are stronger, and drywall and paper blades deliver more cuts per blade. The entire line provides better performance than standard heavy duty blades. View the comparison chart to choose the Stanley blade that is right for you.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return PolicyAmazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here. :

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STANLEY Classic 99 Utility Knife, Retractable, 6-Inch, (10-099)

STANLEY Classic 99 Utility Knife, Retractable, 6-Inch, (10-099)


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WARNING:

CHOKING HAZARD -- Toy contains a marble. Not for children under 3 yrs.
CHOKING HAZARD -- Toy contains a small ball. Not for children under 3 yrs. To be used under the direct supervision of an adult
CHOKING HAZARD -- This toy is a marble. Not for children under 3 yrs.
CHOKING HAZARD -- This toy is a small ball. Not for children under 3 yrs.
CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

Important information

Legal Disclaimer

Warranty does not cover misuse of product.

Customer reviews

4.3 out of 5 stars
4.3 out of 5
2,391 global ratings

Customers say

Customers like the quality and blades of the utility knife. For example, they say it's a solid product with a stout solid feel. Some appreciate the extra blades that can be stored in the handle. That said, opinions are mixed on sharpness, value, ease of use, and ease of assembly.

AI-generated from the text of customer reviews

424 customers mention330 positive94 negative

Customers like the quality of the utility knife. They say it's a solid, thick, and strong knife. The blade is resistant to lateral forces and is highly functional. Some customers also mention that the product is nice and gets the job done.

"...The 99E * has a stout solid feel * rattles if spare blades are in it but not nearly as much as the 10-499 A small piece of foam stops..." Read more

"Exactly what I was looking for. Sturdy and durable." Read more

"...The blade mechanism is convenient, smooth, and more robust than the Stanley 10-499. Even the screw that keeps it shut is good quality...." Read more

"...Price: $3.88Pros: arrived quickly; is very sturdy; fits my hand nicely (ergo)..." Read more

64 customers mention64 positive0 negative

Customers like the blades of the utility knife. They say it comes with three blades and an extra blade. Some customers also appreciate the clever mechanism for replacing and storing blades.

"...as you run the button forward again. * This knife comes with eight blades ! ! ! The 99E comes with three. * ONE small problem . . ...." Read more

"...If you buy extra blades, it looks like the storage compartment can hold quite a few, probably more than 10.Hope you find this helpful!" Read more

"...Sturdy enough for heavy use, and with area for blade storage inside. A little rough in finish, but functions as it should...." Read more

"...It comes with three blades and has room to store even more. It has three different lengths you can advance the blade for safer trimming & cutting...." Read more

175 customers mention100 positive75 negative

Customers are mixed about the sharpness of the utility knife. Some mention that it cuts great, slices extremely well, and holds the edge quite well. However, others say that it arrived without any blades.

"...The blade is very sharp, and it easily cuts through carboard boxes. It is a nice utility knife, if you ignore Stanley’s quality control issues." Read more

"...It works fine but seems kind of flimsy so I suspect the blade will come off the track again at some point. But I’m satisfied with my purchase ." Read more

"...But it does fine for cutting packing tape or thin cardboard...." Read more

"...Later note: It turns out that all 3 blades ARE inside, so the knife must be opened before using...." Read more

130 customers mention90 positive40 negative

Customers are mixed about the value of the utility knife. Some mention it's good value for money, the cheapest box cutter they could find, and it works perfectly. That said, some say it'd be a waste of money and the blade holder and slide are cheap.

"...(plus it's cheap to replace compared to other knives)..." Read more

"This is worth the $6." Read more

"...A waste of money, unless you have used this knife before and know exactly how to assemble it." Read more

"...I highly recommend this box knife. It is a weapon worth acquiring. A sturdy tool to pass down from generation to generation like a quality sword...." Read more

127 customers mention84 positive43 negative

Customers are mixed about the ease of use of the utility knife. Some mention it's easy to hold and use, simple, and comfortable. However, others say that it doesn't come preassembled and the instructions are small and unclear.

"...button spring for the blade settings. * super easy to feel the blade setting notches * They added some thing to cause friction to hold..." Read more

"...This new one is almost identical to it; easy to hold and use. If it lasts half as long it will see me to the Promised Land. :-)" Read more

"...It didn't have any packaging, just sent in a large nonpadded plastic bag and seemed scratched up...." Read more

"...The blade mechanism is convenient, smooth, and more robust than the Stanley 10-499. Even the screw that keeps it shut is good quality...." Read more

65 customers mention28 positive37 negative

Customers are mixed about the ease of assembly of the utility knife. Some mention it's pretty easy, user friendly, and convenient, while others say it can't be easily assembled and that installing the cartridge was a bit tough.

"...For the price, I'm fairly impressed. Initial assembly took me a minute, as the guide/holder for the blade doesn't really "seat" firmly in..." Read more

"...It was a struggle to get it open but afterwards it screwed in and out easily... it was like the screw may have been crooked originally...." Read more

"This thing is way too difficult to put together...." Read more

"...Boom! They went in without any trouble and finally, I could put the knife back together without any issues with the blade going in or out...." Read more

43 customers mention4 positive39 negative

Customers find the screw to be difficult to open. They also say it's difficult to slide the blade open. Customers also mention the knife must be opened before using.

"...It was a struggle to get it open but afterwards it screwed in and out easily... it was like the screw may have been crooked originally...." Read more

"...The screw was very hard to open and one blade was already in place and there was only one on extra side, yet ad said there would be 3 blades...." Read more

"...The only negative is you have to remove a screw to change blades, but it only takes a few seconds to do this, and it's not something you will do..." Read more

"...it's very resistant to being "opened" (having the blade pushed out), and once it's out all the way, the blade won't go back in...." Read more

37 customers mention6 positive31 negative

Customers are dissatisfied with the size of the utility knife. They mention that the two halves do not fit together as well, nor slide to use as easily as it used to. The screw does not fit, and the components are slightly off in size. The design is not the highest quality in fit and finish, and it rattles a little.

"...Figured why not get the Pro. Pro is too big for my pouch (but not for the workshop peg board at home ) and I use the short blade settings all the..." Read more

"...for extending the blade sticks on the way out because the throat was cast too narrow...." Read more

"...They're just half a millimeter too big from the blade edge to notches." Read more

"...This one is a little rough and does not fit together smoothly. It does work, but hits bumps as you slide the blade in and out...." Read more

Hard to improve on this
5 Stars
Hard to improve on this
What started this whole foray into box knife utopia for me is the 99E at work got taken off some where, I took in my 10-499 from home and it drove me nuts with the rattling and blade setting not staying where I put it.Figured why not get the Pro. Pro is too big for my pouch (but not for the workshop peg board at home ) and I use the short blade settings all the time (see comment on Pro bellow ) so I ordered another 99E because I knew I liked it. If they had cheapened the knife I was all set to order the Milwaukee with the blade advance on the side but I don't need the bulk so since the 99E is still very well made I am all set.The 99E * has a stout solid feel * rattles if spare blades are in it but not nearly as much as the 10-499 A small piece of foam stops the rattle. * has five VERY distinct blade settings. * has the firmest button spring for the blade settings. * super easy to feel the blade setting notches * They added some thing to cause friction to hold the screw for opening the case so the screw won't rattle loose. That was a nice touch.The 10-499 * is the lightest by far but strong enough * I find that how ever I grasp it the button gets pushed and the blade advances to the longest setting while cutting up large boxes (many bicycle shipping boxes ). * It rattles a lot * Three blade settings with a slight extension on the forth but that is to remove the blade using the side blade release button.The "Pro-Grade" * It is a very substantial box knife * It is "defend your castle from invaders" substantial (if it is a small castle and there are only half a dozen invaders ). * As you can see from the photo it is way larger. If you are wearing gloves and can't hang onto a smaller box knife the Pro is made with you in mind. * When I slipped it into my small tool pouch on my belt I was concerned with how much room it took up and it is heavy. * The blade changing mechanism works really , really well. Never a snag. Just run the thing back after pulling out the worn out blade and it grabs and advances another blade as you run the button forward again. * This knife comes with eight blades ! ! ! The 99E comes with three. * ONE small problem . . . the spring for the blade advance setting lock is very weak so it is hard to tell were the notches are. It takes a knack and practice to even find one consistently and it is not quick. For the most part this knife will be used with the blade fully extended so not a big deal. Once in a notch it stays put.There is a metal flap spring with a coil spring reinforcing it that pushes against the side of the spare blades to hold them tight against the self loading feeder. This seemed to effect the blade advance lock so I used it with only the one blade being used. Still hard to find the notches. * There are three blade settingsThe photo shows the minimum setting for each blade. A bit longer on the Pro than the rest.
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Top reviews from the United States

Reviewed in the United States on February 1, 2012
What started this whole foray into box knife utopia for me is the 99E at work got taken off some where, I took in my 10-499 from home and it drove me nuts with the rattling and blade setting not staying where I put it.
Figured why not get the Pro. Pro is too big for my pouch (but not for the workshop peg board at home ) and I use the short blade settings all the time (see comment on Pro bellow ) so I ordered another 99E because I knew I liked it. If they had cheapened the knife I was all set to order the Milwaukee with the blade advance on the side but I don't need the bulk so since the 99E is still very well made I am all set.

The 99E
* has a stout solid feel
* rattles if spare blades are in it but not nearly as much as the 10-499 A small piece of foam stops the rattle.
* has five VERY distinct blade settings.
* has the firmest button spring for the blade settings.
* super easy to feel the blade setting notches
* They added some thing to cause friction to hold the screw for opening the case so the screw won't rattle loose. That was a nice touch.

The 10-499
* is the lightest by far but strong enough
* I find that how ever I grasp it the button gets pushed and the blade advances to the longest setting while cutting up large boxes (many bicycle shipping boxes ).
* It rattles a lot
* Three blade settings with a slight extension on the forth but that is to remove the blade using the side blade release button.

The "Pro-Grade"
* It is a very substantial box knife
* It is "defend your castle from invaders" substantial (if it is a small castle and there are only half a dozen invaders ).
* As you can see from the photo it is way larger. If you are wearing gloves and can't hang onto a smaller box knife the Pro is made with you in mind.
* When I slipped it into my small tool pouch on my belt I was concerned with how much room it took up and it is heavy.
* The blade changing mechanism works really , really well. Never a snag. Just run the thing back after pulling out the worn out blade and it grabs and advances another blade as you run the button forward again.
* This knife comes with eight blades ! ! ! The 99E comes with three.
* ONE small problem . . . the spring for the blade advance setting lock is very weak so it is hard to tell were the notches are. It takes a knack and practice to even find one consistently and it is not quick. For the most part this knife will be used with the blade fully extended so not a big deal. Once in a notch it stays put.
There is a metal flap spring with a coil spring reinforcing it that pushes against the side of the spare blades to hold them tight against the self loading feeder. This seemed to effect the blade advance lock so I used it with only the one blade being used. Still hard to find the notches.
* There are three blade settings

The photo shows the minimum setting for each blade. A bit longer on the Pro than the rest.
Customer image
5.0 out of 5 stars Hard to improve on this
Reviewed in the United States on February 1, 2012
What started this whole foray into box knife utopia for me is the 99E at work got taken off some where, I took in my 10-499 from home and it drove me nuts with the rattling and blade setting not staying where I put it.
Figured why not get the Pro. Pro is too big for my pouch (but not for the workshop peg board at home ) and I use the short blade settings all the time (see comment on Pro bellow ) so I ordered another 99E because I knew I liked it. If they had cheapened the knife I was all set to order the Milwaukee with the blade advance on the side but I don't need the bulk so since the 99E is still very well made I am all set.

The 99E
* has a stout solid feel
* rattles if spare blades are in it but not nearly as much as the 10-499 A small piece of foam stops the rattle.
* has five VERY distinct blade settings.
* has the firmest button spring for the blade settings.
* super easy to feel the blade setting notches
* They added some thing to cause friction to hold the screw for opening the case so the screw won't rattle loose. That was a nice touch.

The 10-499
* is the lightest by far but strong enough
* I find that how ever I grasp it the button gets pushed and the blade advances to the longest setting while cutting up large boxes (many bicycle shipping boxes ).
* It rattles a lot
* Three blade settings with a slight extension on the forth but that is to remove the blade using the side blade release button.

The "Pro-Grade"
* It is a very substantial box knife
* It is "defend your castle from invaders" substantial (if it is a small castle and there are only half a dozen invaders ).
* As you can see from the photo it is way larger. If you are wearing gloves and can't hang onto a smaller box knife the Pro is made with you in mind.
* When I slipped it into my small tool pouch on my belt I was concerned with how much room it took up and it is heavy.
* The blade changing mechanism works really , really well. Never a snag. Just run the thing back after pulling out the worn out blade and it grabs and advances another blade as you run the button forward again.
* This knife comes with eight blades ! ! ! The 99E comes with three.
* ONE small problem . . . the spring for the blade advance setting lock is very weak so it is hard to tell were the notches are. It takes a knack and practice to even find one consistently and it is not quick. For the most part this knife will be used with the blade fully extended so not a big deal. Once in a notch it stays put.
There is a metal flap spring with a coil spring reinforcing it that pushes against the side of the spare blades to hold them tight against the self loading feeder. This seemed to effect the blade advance lock so I used it with only the one blade being used. Still hard to find the notches.
* There are three blade settings

The photo shows the minimum setting for each blade. A bit longer on the Pro than the rest.
Images in this review
Customer image Customer image
48 people found this helpful
Report
Reviewed in the United States on September 21, 2023
Stanley makes great stuff. I used my previous box cutter for decades, at least 3-4 times a week. It was given to me by my aunt more than 35 years ago. The slide button on top finally broke off so I can't retract the blade but it's still usable. This new one is almost identical to it; easy to hold and use. If it lasts half as long it will see me to the Promised Land. :-)
Reviewed in the United States on February 14, 2024
Exactly what I was looking for. Sturdy and durable.
Reviewed in the United States on February 10, 2024
In my opinion this is the best utility knife on the market. I've also used the Stanley 10-499 and the Sheffield 12115 (a lockback style utility knife). Compared to those, the body of this knife is smoother, allowing you to apply maximum force on your cuts without hurting your hand. The blade mechanism is convenient, smooth, and more robust than the Stanley 10-499. Even the screw that keeps it shut is good quality. I haven't had it for long so I can't speak to longevity, but with its simple all-metal construction I bet it will last a long time (plus it's cheap to replace compared to other knives).
The obvious downside is needing a screwdriver to change the blades. I think it's worth it for how sturdy this knife is, but if they could make it easier to open (e.g. by using a thumbscrew instead of a philips) this would be the perfect utility knife.
One person found this helpful
Report
Reviewed in the United States on April 25, 2019
Just what I needed! I had this cheapy "safety" box cutter that was never awesomely sharp and lately I've needed to cut down cardboard boxes and it was a struggle so: "Amazon to the rescue"!

Price: $3.88
Pros: arrived quickly; is very sturdy; fits my hand nicely (ergo)
Cons: upon receipt you need to open it up to get to the blade inside. It was a struggle to get it open but afterwards it screwed in and out easily... it was like the screw may have been crooked originally.

Would definitely buy again! This makes quick work of cutting up cardboard!
My only regret? That I didn't buy 1 for every toolbox!
One person found this helpful
Report
Reviewed in the United States on January 11, 2024
Screw that holds the 2 halves together was "crossthreaded at the manufacturer". It was a major feat to
get it to come out. Problem is that when you try to put the screw back in the hole, it does not want to go
in straight and it will never work right again.

Not sure why I can't return this for a replacement, since the product is certainly defective! I have ordered
many of these same utility knives over the years, and I have never had an issue with one.
Reviewed in the United States on February 26, 2024
This is worth the $6.
Reviewed in the United States on February 23, 2024
I absolutely love it.

Top reviews from other countries

Translate all reviews to English
Xenneca
5.0 out of 5 stars Muy buena calidad
Reviewed in Mexico on April 25, 2024
Incluye 3 navajas al interior de la carcasa. Se tiene que desarmar para ajustar la navaja cosa que me parece muy bien pues por seguridad es mejor que sea poco accesible.
Customer image
Xenneca
5.0 out of 5 stars Muy buena calidad
Reviewed in Mexico on April 25, 2024
Incluye 3 navajas al interior de la carcasa. Se tiene que desarmar para ajustar la navaja cosa que me parece muy bien pues por seguridad es mejor que sea poco accesible.
Images in this review
Customer image
Roger
5.0 out of 5 stars Good deal, can't go wrong
Reviewed in Canada on August 19, 2018
These are O.K. for the money... I definitely prefer more decent retractable knifes, but the blades are good, and this is good enough for function, You can't go wrong for how cheap this is. I recently compared these to cheap Scalpel blades, and these Stanley Razors hold there edge far longer and are also far stronger and thicker steel then the scalpel blades through my testing, TBH the testing didn't last long for the cheap scalpel replaceable blade at all, really bad steel on cheap scalpels. These Stanley Razors are cheaper and better, especially for the money, I'll have to test these Stanley Razors against more expensive Scalpels in the future!
George
5.0 out of 5 stars Quality
Reviewed in Australia on December 21, 2023
Good as gold well known brand quality and durability simply you pay for what you get surprised was made in USA strongly recommend it no hassles as described happily Larry thanks to Amazon and the trusted seller
A. Butler
5.0 out of 5 stars Not called classic for nothing
Reviewed in the United Kingdom on June 14, 2014
I got two of these in the hopes that I'd always be able to find one when needed. A good choice as these knives are so useful. The blade locking mechanism is good and strong, there is no real play in the blade in use. Very pleased with these indeed.
Melissa Cárdenas
5.0 out of 5 stars Resistente
Reviewed in Mexico on March 28, 2024
Tiene buena calidad