From the Manufacturer: Slice® Utility Knife Blades are compatible with several tools, including Slice utility knives and scrapers, the Edge Utility Cutter, and the Manual Carton Cutter. Designed to cut everything but you, these blades boast a finger-friendly® edge that never rusts. They’re built to last, so you won’t have to worry about frequently changing blades, reducing the risk of injuries. From cutting cardboard and foam board to slicing plastic banding, piercing flexible plastic sheeting to puncturing tarp, Slice makes people and places safer. Pointed Tip: Pointed tip easily penetrates flexible materials 100% zirconium oxide blade that never rusts Blade lasts on average 11.2x longer than metal blades Round Tip: Safer than traditional blades 100% zirconium oxide blade that never rusts Blade lasts on average 11.2x longer than metal blades