The Speed Lock is one of Boker's most successful designs, ever! The push-button safety locks the blade firmly in either the open or closed position. In both sizes, the handle bodies are made of aluminum to keep the weight to a minimum. Features: Blade material: 420 Stainless Steel Handle Material: Silver Aluminum Blade Length: 3-1/2" Closed Length: 4-3/4" Weight: 4.2 oz