About this item Pack of 72 razor-sharp utility knife. We recommend that you wear goggles when using. Heavy Duty Box Cutters Ideal for Thicker Cutting: Boxes, Drywall, Roofing, Leather, paper, photo, plastic, Cardboard, Rubber, Kevlar, Linoleum, and Much More 18mm wider blade for deep and easy cutting High-grade carbon steel blades stay sharp longer.Always keep your blade fresh and sharp by snapping off the blade for a new sharp cutting tip Thickened hard plastic housing offers nice grip Simple and fast locking mechanism