9mm Slide Lock Utility Knife (A-1) - Multi-Purpose Retractable Precision Knife w/ Snap-Off Blade, Replacement Blades: Any OLFA 9mm Blade

Love the weight/design and feel of this knife. We use this in our small business and Olfa is our go to knife. The blade quality is way better than competitors and is very sharp! We have used olfa for years so they are durable and great value.

Best utility knife around. Economical replacement blades. Never have an issue.

I tried this as a pocket knife replacement, at work there's copious amounts of tape and cardboard and cling wrap to cut, and outside work packages mostly, the odd string, paper and such, mail and the like; I've always had a pocket knife but grew tired of cleaning tape residue, and sharpening blades that I could never get razor sharp, and even when I got close they would dull and chip if dropped. With a slight mod to the clip (sanding down the inner nub, for easier sliding into the pocket), I can now do all the pocket knife tasks aside from stabbing one in self defense, yet slashing is still available, without having to constantly maintain and worry about dmaging or losing my knife. Not only are these so cheap you can buy 10 for the price of a decent knife, you can also easily snap off each blade that is dull, or chipped or covered in residue, providing a new sharp edge. I also own the ss version but like another review stated I enjoy this one better, feels better in the hand and also doesn't have any sharp metal edges that would scrape my hand when entring into my pocket. The construction on these are sound, nothing feels cheap or readily breakable, for the price of a pen you can have a cutting implement that will surpass your expectations.

I've switched to only using OLFA brand knives for hobby work. Adjusting the blade length is never a problem like I have experienced with other brands.

I bought the bigger version as well .. nothing but quality here .. they are not cheap , but it's the best one i've ever used. Fully metal lined to support the blade, ratchet mechanism works flawlessly and unlike cheaper version , the blade stays exactly in the setting you desired , you can apply pressure and the blade stays firmly in place and cuts like butter. you get what you pay for, and it's worth every penny!

The OLFA 9mm Slide Lock Utility Knife is a fantastic little tool. It’s lightweight, easy to control, and the snap‑off blades stay sharp for a long time. The slide lock feels secure, so the blade doesn’t slip while cutting. Great for crafts, packaging, and detailed work. Simple, durable, and exactly what you want in a precision knife. If you’d like an even shorter or more energetic version, I can shape it however you like.

My dad was a contractor who gave me my own tool box full of tools at age 14, saying "girls need to know how to fix their own stuff, if only to know if their contractor is cheating them", and in that box was my first Olfa knife, which I used until September 2023, when some unsavory contractors stole all my tools, so when I purchased this new Olfa knife, I was highly disappointed. This knife is slightly shorter, thinner, and physically lighter than the older knives, with less heft, are cheaply made, and feel somehow off, which gives me less confidence when using it, which leads to easily cutting oneself, which I have done for the first time in years. Make no mistake, these knives are equally as sharp, if not sharper, as the old ones were, but feel cheap. May I suggest you use the (yellow) Olfa 215B knife which, while made of a heavy duty plastic, has all of the attributes the metal knife has lost. If anything, the only issue I may have with the 215B is that none of its instructions are in English, which are only necessary because I refill them with Olfa blades.

Perfect utility/ box cutting knife to have around the house. I actually misplaced mine and immediately ordered a replacement. I think I have at least 3 now.

My favourite brand and size of knife

Good item

I have been using the same Olfa 9mm for over 20 years. Just bought 2 of these knives for other work stations in our business and it's nice to see Olfa's quality still remains the same. Tough, sturdy tools and I'll probably see another 20+ years out of these new ones too.

Great brand. Great knife. But use bigger one for boxes. Besides with an tabletop paper cutter i don't find I need it for anything rn. Although if I got back into charcoal drawing, especially reductive work, I would use this for sharpening mechanical eraser sticks.

Works as it should. I like the pocket clip as well