REXBETI Utility Knife | Shrink Box Cutter For Cartons | Cardboard And Boxes | 18mm Wider Razor Sharp BladeREXBETI Utility Knife Shrink Box Cutter For Cartons Cardboard And Boxes 18mm Wider Razor Sharp Blade Pack of 72 sharp utility knives. We recommend that you wear glasses when using it. Heavy duty box cutters ideal for thicker cuts: boxes, drywall, roofing, leather, paper, photography, plastic, cardboard, rubber, Kevlar, linoleum and much more 18 mm wider blade for a deep and easy cut. High quality carbon steel blades stay sharp longer. Always keep your