OLFA® L-1 Heavy Duty Utility Knife, 18 mm W Snap-Off Blade, 1 Blades Included, High Carbon Steel Blade, 6 in OAL

With this OLFA® utility knife, you're not locked into a fixed depth; its ratchet lock mechanism gives you unlimited blade positions. The knife has a micro honed blade for superior sharpness and edge retention. Use this utility knife for heavy duty cutting.