COMFORTABLE & DURABLE: Stainless steel channel and ABS housing with soft TPR grip offer excellent control. 18mm wide SK2 blades are sharp and durable. WIDELY USED: It can easily cut carton box, paper, plastic, cardboard, fabric, leather, foam sheet and crafts. Suitable for office and home use. SNAP-OFF BLADES: Each blade has 8 break-off positions for durability. All you need is to snap off the dull blade by pliers leaving a new sharp edge. End cap also functions as blade snapper. SMOOTH RETRACTING: The auto-lock design helps to push out and retract the razor blade smoothly with different cutting depths as you need. REPLACEMENT BLADES: 2 spare blades are stored at the rear of the handle in each knife. XW utility knife is well designed for sharpness and durability. This snap-off utility knife is made of ABS housing and anti-slip TPR grip. It can easily cut carton box, paper, plastic, cardboard, fabric, leather, foam sheet and crafts. Suitable for office and home use.