The SOG Bluto BK-01 Folding knife is overall open length 5.5" long with a 2.25" blade featuring a muscular, beefy stance. This little knife is all about power and strength. Built with an innovative textured machined blue aluminum handle that gives you a ton of control, the Bluto also features a VG-10 blade with the Arc-Lock system. Great look, great knife.rarely find. Strength: The Arc-Lock far surpasses conventional lock strength, tested at over 1000 lbs of force measured at the lock in an independent lab test. Speed: The Arc-Lock provides lightning-quick, one-handed opening and closing capability. Safety: Spring-action securely retains the blade closed. When unlocking, the fingers are safely kept clear. Durability: The Arc-Lock is self-adjusting over time and can be easily cleaned for long term optimal performance.