Irwin Professional Snap-off Screw Cutter KnifeIrwin Professional Snap off Screw Cutter Knife This durable snap off knife features a screw thread for convenient user controlled blade fixture. Blade storage for two blades inside the removable cartridge. Strong ABS body with steel blade guide. Texture grip provides improved control. Slim nose design for maximum visibility of the cutting surface. Hinged end cap cannot be separated from body. Model No. Description Qty Box Price per pc 10507581N Bi