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FATMAX 3/4-in 2-Blade Retractable Utility Knife with On Tool Blade Storage

Ratings & Reviews for Stanley FATMAX 3/4-in 2-Blade Retractable Utility Knife with On Tool Blade Storage

2.7
125
Review
 2.7 out of 5
125 Reviews


47% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The product has a mix of positive and negative feedback. Some users found the knife to have a comfortable grip and useful utility, while others struggled with the blade change mechanism, reporting frequent blade slippage or falling out during use, which was seen as a safety issue. The lack of clear instructions on how to use the knife was also a common complaint.

Customer review summary generated by AI, including incentivized reviews.
125 Customer Reviews

how to change blade?

hi. I can’t open blade storage component and don’t know what the red button is for or what the black part in front of the slider does. So with a dull blade I am stuck with a useless door stop. Very unhappy and disappointed in Stanley. Please help.

August 2, 2026

From stanleytools.com

Response from Stanley Tools

We apologize for any inconvenience. Please check out STANLEY TOOLS 10-788 Video https://youtu.be/TRlCH6-ukwE?si=63aAiNWSS7U2x3x1

Stanley ToolsAugust 4, 2026

utility knife

Would Recommend

Great product, I’m a professional carpenter and I use it daily to cut shims for doors and opening up bundles of wood molding.

July 9, 2026

From stanleytools.com

Don’t spend the money

Would Not Recommend

Very poor quality. I purchased this utility knife with the idea that a Stanley product would be of good quality. I was wrong. The first time I tried to advance the blade the slider button got stuck and I’m unable to move the button forward or backward. I tried to open up the knife by unscrewing the screw in the body of the knife. No tool that I own is able to unscrew the screw. Why would Stanley make a very simple tool so complicated. I spent more money on a Stanley utility knife thst is complet...

May 12, 2026

From stanleytools.com

Response from Stanley Tools

Hello Disappointed Handyman, I appreciate your feedback on the utility knife and I'm sorry to hear you are having issues. Your satisfaction is our top...

Stanley ToolsMay 12, 2026

Bad blade storage design.

Worst design ever. The red button to open the storage case does not work. You have to fight to get it to get it to release. With shape blades inside you do not want to struggle to open it. Very dangerous.

February 17, 2026

From stanleytools.com

Response from Stanley Tools

Hello, I appreciate your feedback on 10-778, and I am sorry to hear your having issues with the red button. Your satisfaction is our top priority. We ...

Stanley ToolsFebruary 19, 2026

DO NOT BUY

Would Not Recommend

Completely worthless. This is probably the 20th review complaining about inability to open it, replace blade, etc. Do not waste your time on this. Even Stanley's responses just say "we'll be reaching out to you." What about the rest of us? Can you not post instructions or send documents? What a poor design. Should be discontinued. I'm returning mine unused because it's inoperable.

February 14, 2026

From stanleytools.com

Response from CS

Hello. We appreciate your feedback on the 10-778. We are sorry to hear that you are having problems with your tool. Your satisfaction is our top prior...

CSFebruary 17, 2026

need better instructions & design

Would Not Recommend

I thought this would be an upgrade from the standard utility knife and paid more for it. However 2 complaints: 1) The instructions are minimal and installing a blade according to the instructions (with help of a youtube for similar model) didn't work. The blade disappeared into the body of the tool but I could not retrieve it and could not find a screw driver to take it apart (I tried 7 different screwdrivers, from tiny to lareger but none worked). Finally after fiddling around with it for a w...

November 3, 2024

From stanleytools.com

Response from Social Media Support

Hello. Thank you for taking the time to provide your feedback. Your feedback is valuable as we take into consideration every piece of feedback that we...

Social Media SupportNovember 8, 2024

What do I use this item for?

Would Not Recommend

Like so many other people have indicated this utility knife is of little use. I can't change the blade. The blade that is in there sticks out about an 1/8 of an inch, and I can't get it to move, and can't replace. I did finally get the compartment where the blades are open after taking a knife and wrench to it. Not sure what the red button is for, because pushing it does NOTHING. It is a nice-looking utility knife, but other than that it is useless. Justa womans perspective!!

October 13, 2024

From stanleytools.com

Response from STANLEY Tools

Hello Oralene I appreciate your feedback on the 10-778 Utility Knife, and I'm sorry to hear about the issue you are having with the blades. Your sati...

STANLEY ToolsOctober 15, 2024

I don’t understand the bad reviews on this knife?

Would Recommend

Yep, I love this knife! Quick change works great and there’s room for extra blades in the handle.

September 8, 2024

From stanleytools.com

Substandard

Would Not Recommend

Piece of garbage, watched videos, blade now stuck!

August 16, 2024

From stanleytools.com

Response from Roxy STANLEY

Hello MrTH, I appreciate your feedback on the 10-778 6-5/8 in FATMAX® Retractable Utility Knife and I'm sorry to hear the blade is stuck. Your satisfa...

Roxy STANLEYAugust 20, 2024

Don't buy

discontinue this piece of crap. too hard to add and change blades. doesn't open up and you have no thorough docs - c'mon Stanley

December 26, 2023

From stanleytools.com

Response from Roxy STANLEY

Hello fatmax3, I appreciate your feedback on the STANLEY 6-5/8" FATMAX Retractable Utility Knife and I'm sorry to hear you are having trouble with cha...

Roxy STANLEYDecember 26, 2023

Great cutter

Would Recommend

Have used this cutter for years! Never had a problem. Easy to change the blade. A monkey could do it!

April 14, 2023

From stanleytools.com

Stanley Knife

Comfortable to use. Easy blade storage. Could be easier to change out blades.

April 10, 2023

From stanleytools.com

Blade Stuck inside/Off track

Would Recommend

I love my fatmax. Great knife until my guy friend broke it. The blade in stuck inside the case & I can't get it out. Pressed the red button on the end, and moved the blade forward, nothing. I think it's off track and I want to know how to get it unstuck with out opening. I don't have the right tool to open it. It take a guy to break my tool that I've had for 10yrs with no problems. Can someone help me figure it out cu, my guy friend handed it to me. End of story.

June 10, 2022

From stanleytools.com

Complete and total garbage

Would Not Recommend

Others have complained about putting new blades in. I can't even get to that point because it's impossible to get the storage compartment open where the extra blades are held. Depressing the red circular button is near impossible. Would not recommend at all.

February 5, 2022

From stanleytools.com

Response from CS

Hello We appreciate your feedback on the 10-778 and are sorry to hear about the issue you are having with your product.  This is not the kind of per...

CSFebruary 10, 2022

Blade does not release with the black tab pressed

Would Not Recommend

The old blade is stuck. I researched and watched YouTube videos on how to change blades. It is supposed to release with the black tab on the left near the blade pressed down, but it is completely stuck. So once the initial blade got dull, that was it. And it cannot be taken apart to see how it's supposed to work or if it can be fixed somehow.

January 22, 2022

From stanleytools.com

Response from CS

Hello We appreciate your feedback on the 10-778 and are sorry to hear about the issue you are having with your product.  This is not the kind of pe...

CSJanuary 25, 2022

Not a good knive

Can not believe Stanley put this on market . Not a quick change blade knive like they say , it jams with every blade change on me bad design get real Stanley. made one with no No plastic would help Grrr

December 4, 2021

From stanleytools.com

Response from CS

Hello​, We appreciate your feedback on the 10-778 and are sorry to hear about the issue you are having with your product.  This is not the kind of p...

CSJanuary 7, 2022

Not Recommended

Would Not Recommend

The first time I used this the blade ejection assembly jammed after a day's use, so I returned it and got another one. That one jammed because they put the stupid plastic display card inside the assembly and when I cut that off, a piece o0f the vinyl remained inside, so it was unusable. So I took it apart, but Stanley provides no info anywhere on how to reassemble it--it's not obvious or easy. My Dad used Stanley tools in the 50s, and I followed, but they're made in Thailand now--we're done!

March 10, 2021

From stanleytools.com

Putting Blade in and out

Would Not Recommend

Unable to put blade in properly took it apart to put blade in that way and it was so tight like the blade was to big. Need better quality controls.

December 26, 2020

From stanleytools.com

Great utility Knife

Would Recommend

[This review was collected as part of a promotion.] Bought this knife to use when I was in the stockroom at my previous place of employment the knife preformed flawlessly it cut cardboard boxes like they were warm butter if you work in a warehouse / stockroom or anyplace else you need a utility knife I'd recommend you get this knife

October 22, 2020

From stanleytools.com