1. Made with chromium-vanadium steel forging, high strength and good wear resistance, durable to use.2. Hex Shank Socket Adapter: Designed to provide a securely locking extension for your existing tool. Provide extra length to access hard-to-touch spaces. The spring ball lock ensures a tight fit into the drive head to prevent slipping during use. Specifically machined to be securely installed in a handheld screwdriver, drill driver or impact wrench.3. 6-Point Socket: Has 6-point opening that snugly fits the hex shape of fastener heads, allowing it to apply maximum torque without slipping. The through-hole in the drive end locks onto the tang of impact wrenches or drivers so it won't fall off or stick on fastener heads.4.