Standard Fixed Pro Touch Knife, With 6 Blue Bi-Metal Utility Blades, Optimized Cutting Angle For Reduced Fatigue, Easy Tool Free Entry System, Ergonomic Grip, Inside Storage For 5 Blades, Screw Permanently Captured In Casing To Prevent Loss, Blades Are Shatterproof and Stay Sharper 3 Times Longer Than Standard Utility Knife Blades.