Auto-retract utility knife features a titanium-bonded blade that's three times harder than untreated stainless steel to maintain a lasting sharpness. Corrosion-resistant construction stays strong through daily use for long-lasting performance. Contoured, plastic and metal grip fits comfortably in your hand for greater control and smooth handling. Integrated rope/twine cutter lets you safely cut rope and twine without dulling your blade. Tool-less blade change allows you to quickly replace dull blades without requiring any tools. Storage compartment holds up to five blades to conveniently replace dull blades when needed.