Box Cutters Utility Knives 2Pack, RegerKnife Carpet Razor Knife Heavy Duty with Belt Clip, Lock Back Design, Quick Change Blades, Extra 5 Blades for Cutting Cardboard, Leather, Aluminum, PVC Sheet
These box cutters are super high quality. They came with extra (very sharp blades). I like to keep one in the garage and one in the kitchen which I use to score my bread. I would recommend.