The Pro Blade: The Making of the Best Utility Knife Blade | OLFA - ProfessionalOLFA – Professional

The Pro Blade: The Making of the Best Utility Knife Blade

The Pro Blade: The Making of the Best Utility Knife Blade

Every contractor, tradesperson, pro (call them whatever you want) uses a utility knife for some type of cutting task. In trades like drywall, insulation or flooring installation, the utility knife is a primary tool—you simply can’t cut drywall, insulation, carpet or resilient sheet flooring without a great one. So it’s no surprise that blade durability and cutting-edge longevity are the two most important qualities professional installers look for in a utility knife and blade. After all, a blade that dulls quickly and requires frequent replacement not only increases blade costs, it also reduces productivity and efficiency. And time is money!

A blade that doesn’t maintain a sharp edge increases costs in other ways, too:

  • A dull blade tears the edge, making it more difficult to achieve a clean seam.
  • Dull blades are far more likely to skate off the intended cutting path and veer into fresh areas that then must be repaired or scrapped.
  • Worse yet, dull blades require more downward force, causing hand fatigue and even injuries.


OLFA® utility knife blades start with high-quality carbon steel so it’s strong enough to handle the toughest, most-demanding jobs, yet resilient enough to resist tip breakage and edge chipping. Then we carefully control the grinding speed and sharpening angles to achieve the longest-lasting cutting edge. An exact 59-degree segment edge angle may not mean much to you, but it’s the exact formula to optimize cutting power and minimize blade breakage. All you need to know is OLFA blades slice through all types of construction materials with a minimum of downward pressure.


Beyond durability and long edge life, professionals also demand a utility knife with a quick-change mechanism that doesn’t require tools. OLFA utility knives use a snap-off blade containing multiple cutting segments. Just snap off the dull segment and continue cutting. No screws. No fumbling to refresh the blade. No time wasted.

OLFA snap-off blades are available in 9mm, 18mm and 25mm sizes, and are made from high-quality carbon steel, double-honed to provide superior sharpness and edge retention. For the toughest jobs, use ultra-sharp black blades, which have a 25% sharper edge for less cutting resistance.


If that’s not convincing enough, we’ve heard from contractors and pros that OLFA’s no-tool blade change is a game changer on the job site. Instead of reaching for other tools to remove the blade, OLFA utility knives are quick-change, no-tools-needed. That gets you back to work faster.

How does it work? Simple. Carefully release a blade from the secure stainless-steel channel at the rear of the knife. Dispose of the remaining section of the worn blade safely, and reload a new blade from the rear. Blades must be securely attached to the locking mechanism. How? A single stamped hole in OLFA replacement blades connect directly and securely to a raised pin in the rear locking mechanism. This lock also advances the blade during use. A perfect fit, efficient change and back to work.


OLFA snap-off blades move smoothly in a sturdy stainless steel channel designed to prevent side-to-side blade movement when cutting. The channel extension supports the blade segment to offer additional support and prevent segment break-off until you initiate it.


Other utility knife manufacturers build their products to hold a typical trapezoidal blade, and they assume all blades are the same. They’re not. OLFA utility knives are built around our superior blade. So if you’re looking for the best utility knife for your job, rely on the only one that uses OLFA blades, which are focused on its primary job above all else: Making crisp, clean cuts.


  • CUTTING DRYWALL: Drag the blade across the drywall paper face without pressing too deeply into gypsum. Pressing hard isn’t necessary and can cause the blade to wander off the cut mark.
  • ELECTRICAL WORK ON ROUND CABLES: Use a utility knife to slice a 1″ longitudinal cut at the end of a round cable. Separate the jacket and use the ripcord to tear the jacket open. Cut the ripcord with the utility knife.
  • PLASTIC SHEETING: Cut plastic sheeting from the roll before unfolding. Unroll the desired length of plastic sheeting. Lay the cutoff line on a scrap piece of wood and slice through the folds with a utility knife. Then unfold.
  • FIBERGLASS INSULATION: Lay the planned cut over a scrap piece of plywood. Place a 2×4 over the insulation to compress it. Use the 2×4 as a guide and cut through the insulation with the utility knife. Only use the OLFA solid replacement blade for thick insulation.