Use your Slice 10512 Auto-Retractable Pen Cutter on the job and at home to cut paper, plastic, or cardboard. The cylindrical, glass-filled, nylon handle houses a zirconium oxide ceramic blade with a finger-friendly edge that is sharp for materials, but resistant to cutting skin. The rubberized slider button pushes the blade out and retracts automatically when released. The blade is non-conductive, non-magnetic, non-sparking, and chemically inert, so it will never rust. This knife can be used whether you are left- or right-handed because it has an ambidextrous design, and the blade can be changed tool-free.