Self Retracting Safety Utility Knife & Bi-Metal Safety Blade, Knife Self-Retracts When Not Actuating The Slider Button, 2 Positions: Full Extension For Utility Cutting & A Short Position For Box Cutting, Ergonomic Handle With 19 Degree Cutting Angle, Knife Also Features No Lose Screw For Easy Opening, Comes With 1 Irwin Blunt Tip Patented Bi-Metal Safety Blade.