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Model #5003

Store SKU #250156

18 mm Ratchet Lock Utility Knife

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Product Overview

18 mm Ratchet Lock Utility Knife - this popular, heavy-duty cutter features a contoured ABS handle and a ratchet wheel blade-lock. Blade is made of high-quality Japanese grade carbon tool steel and designed for unparalleled sharpness and superior edge retention. Long lasting and durable - a new sharp edge with just a snap.
  • Good for cutting paper, cardboard, roofing, drywall, vinyl, acetates, etc.
  • Professional strength stainless steel 18 mm blade
  • Easy, tool-free blade change
  • Satisfaction guaranteed



Blade Length (in.)0.709 inBlade Width (in.)0.708661
Handle Length (in.)5Product Depth (in.).875
Product Length (in.)8.75Product Width (in.)1.5


Blade Edge TypeStraight EdgeBlade MaterialSteel
FeaturesLockable Blade,Removable Blade,Retractable Blade,Weather ResistantHand Tool TypeUtility Knife
Handle MaterialPlasticIndividual/SetIndividual
Knife TypeUtility KnifeLock TypeSide Lock
Number of Pieces1Product Weight (lb.)0.19 lb
Replacement Blade TypeSnap Off Blade KnivesTools Product TypeHand Tool

Warranty / Certifications

Manufacturer WarrantyYes

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.8
    out of 86 reviews
  • 98%recommend this product
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Showing 1-10 of 86 reviews
Always in my back pocket
As a cabinetmaker this knife Doesn’t leave my person. I like this model the best because it’s sleek and smooth and I can’t even tell it’s in my pocket. I use it for everything from cleaning the tip of a glue bottle to cross cutting veneer. I even carve with it from time to time it’s that sharp. A great knife and a must have for any wood shop.
    • Recommended
    Most used tool in my toolbox
    I use this particular knife in my everyday work field. It performs the best as a rubber cutting tool and I wouldn’t look to use anything else. Other knifes dull quickly and a relatively unsafe. Having the ability to retract the blade and stick it in my pocket is one of the best aspects
      The Everyday Knife!
      This knife is the perfect go to knife for any project. I’ve had ones that last 10+ years without issue. Now of course that doesn’t include the blade lifespan but those are easy and quick to change out and the breakaway blades are a great way to keep a sharp edge. Durable, simple, and cost effective this knife is my number 1 choice.
        • Recommended
        The Best!
        This knife is the best. I’ve used it on construction sites and in the art studio for the past 13 years. Any other utility knife just won’t do. It’s light, comfortable to use, and because of the ratchet lock you’re able to get a very precise and secure blade depth. A must.
          • Recommended
          Ive used different utility knives for years and this is the best one that I have purchased
          Ive used different utility knives for years and this is the best one that I have purchased
          • Verified Purchase
          • Recommended
          Handy tough knife
          This knife has multiple uses around our place. Used it first to cut out some cardboard templates for spraying. Then used it while adding LED bar lights to my Side by Side. Wiring, stripping, and cutting out dash plastic for installing switches. It cut the plastic easily and cleanly. Also used it for cutting string to tie up tomato plants. The blades are very sharp and having plenty of replacements is a bonus. I recommend this knife
          • Recommended
          Excellent, solid and comfortable
          This is a surprisingly nice knife! The handle is made of high impact ABS plastic and very smooth which makes it feel very comfortable to hold and use. I cannot imagine breaking it. The construction is very solid, with stainless steel guides for the blade and brass threads on the ratchet wheel that hold the blade in place. The design is good, new blades are easily inserted from the back in seconds. No additional tool is needed to change blades. See picture. Blades are 18mm high and 0.5mm wide. A variety of blade types are available too. The blade is extremely sharp as one would expect!. They are made from carbon tool steel. Each blade provides eight blades that one can snap off as soon as they get dull or blunt. The packaging directs us to the company website for a satisfaction guarantee, but all I could find there was that unopened products would be replaced or refunded. I can’t imagine one being unhappy with this product anyway. Made in Japan!
          • Recommended
          Time-proven Design Excellence
          The OLFA L-1 Pro18 ratchet-lock utility knife is sharp, precise, and ergonomic. The blade is held securely in a stainless steel channel within a ridged ABS plastic handle. The black knob ratchet lock mechanism allows adjustment of the exposed blade length to control cutting depth. The double honed carbon steel blade has excellent sharpness and edge retention. The snap-off blade design provides quick convenient access to a new sharp edge when needed. The non-slip ridged handle is comfortable to hold for precise control. Additional blade types are available. Highly recommended.
          • Recommended
          1 found this review helpful
          This Olfa utility knife handles any use and abuse with no issues at all! As a plumber/HVAC tech it definitely has a permanent spot in my tool bag.
            • Recommended
            Just what you need!
            I have nothing bad to say about this product. The handle is sturdy in my hand and the blade is completely stable and doesn't move around the handle like it does with cheap utility cutters. I have three of these because I kept misplacing it.
              • Recommended
              Showing 1-10 of 86 reviews