Boker 03BO504 Forge Utility Knife with 4 3/8 in. Blade, Black Knife is perfectly balanced and forged from one piece of specially tempered high carbon steel to ensure outstanding strength Ergonomically designed handle offers a comfortable and secure grip for effortless cutting Hand washing recommended Blade length: 4  in. Thickness: 1.5 mm. Overall length: 8  in. Weight: 3.5 oz. Limited Lifetime Warranty