This utility knife hook blade is a powerhouse cutting tool for your home carpentry needs and even for professional users. This blade can go through linoleum, plywood, particle board, chip board, roofing materials, cartons, carpet, fabric and sheet materials as well as a wide variety of other material. The blade's shape helps prevent damage to whatever is beneath the material being cut. Its two hooked ends also cut to full thickness in just one stroke. The blade fits a series of knives. Cuts linoleum, roofing materials, cartons, etc.Two hooked ends cut to full thickness on one strokeFits the following knives: 10-179 (2512-3712), 10-175 (2512-3019), 10-099 (2512-3100), 10-299 (2512-3050), 10-499 (2512-3258), 10-079 (2512-3035), 10-399 (do not stock), 10-165 (2512-2631), 10-519 (2512-2771), 10-599 (do not stock), and 10-189 (do noSize: 2-1/16 in.5 per card