Carbon Steel SK5 Utility Knife Blades, Durable Single Edge Razor Blades, 10 Pack Heavy Duty Replacement Blade For Box Cutter Knife Features: *Made of high quality of carbon steel, sturdy, lightweight, durable, not easy to break, keep sharp for a long time. *Sharp and durable: easy to cut and has a long life service. 10Pcs in one case for long time using. *It can be applied in home decoration, office supplies, manual cutting,paper, plywood, plastic, leather, etc. *Transparent storage case is portable, easy to carry away. Small size won't take much space. Specifications: Product name: SK5 Razor blade Material: Carbon steel Color: Silver Size: As the picture show Suitable for: Cutting Quantity: 10 Pcs