WennoW"10 Utility Blades Razor Sharp Box Opener Carton Cutter Knife Replacement "10 Utility Blades Razor Sharp Box Opener Carton Cutter Knife Replacement Item Description for use with fixed blade knives only for cutting thick dense sheet materials lightweight with die-cast handle fits most standard utility knives replacement blades for our utility knife Ideal for construction, industrial and garage use (10pcs per Pack)