OLFA 18mm snap knife blades. The best choice of replacement blades for your OLFA utility knife or cutter. These snap blades are made of high-quality carbon tool steel with a double-honed blade for unparalleled sharpness and superior edge retention. Exact 59 degree edge angle optimizes cutting power and minimizes blade breakage. Fits all 18mm OLFA utility knives. 8 snap-offs per blade. Use for construction materials including drywall, linoleum, carpet, flooring, insulation, roofing materials. PACK OF 50 (400 snap-offs total).