Work with confidence with the 18MM Snap Knife and Replacement Blades set. The heavy-duty Utility Knife is lightweight but stands up to the everyday rigors of the most demanding job sites. The ergonomic handle contours to the hand, making this knife your go-to cutting tool. The rugged stainless steel blade channel extends the handle's full length to support heavy-duty cutting. The auto-lock blade slider allows for quick and easy one-touch blade extension for multiple cutting depths. The 18mm Heavy-Duty Ultra-Sharp Snap-Off SpeedBlade combines the ultra-sharpness of OLFA black blades with a special non-stick coating for faster cutting. This blade starts with a high-quality Japanese tool steel black blade that is double-honed to be 25% sharper than a standard OLFA silver blade. Complete your toolset with the 18MM Snap Knife and Replacement Blades set to work through dense materials.