Specifications:  Rugged Zinc Alloy Construction is 50% Heavier than Conventional Knives  Contoured and Notched Grip-Lock Housing Improves Non-Slip Performance  8-Position Retractable Blade  SK-5 Spring Steel Blades  Double Overlap Safety Blade Shield  Thick, Protective Yellow Enamel Coating  Uses Universal 2-Notch Replacement Blades  Packaged with One Blade Loaded and a Spare Blade Included  Cuts Cardboard, Plastic, Leather, Carpet, Linoleum, Rope, etc.