Engineered from high-carbon tool steel to offer unmatched sharpness for superior cutting and edge retention. This versatile blades fit a variety of OLFA® knives including the SK-4 and SK-9 safety knives as well as the UTC-1 utility knife. Ideal for cutting corrugate, shrink wrap, plastic strapping, paper, and more. (SKB-2/5B, #9612)\n\n- Standard trapezoid blade design\n- Made from high-quality carbon tool steel\n- Superior sharpness and edge retention for general use\n- The blades fit SK-4 and SK-9 safety knives and the UTC-1 utility knife\n- Also available in packs of 10 and 50