Feature:1. VANADIUM CHROMIUM STEEL MATERIAL Selected high hardness vanadium chromium steel material, high torsion, chrome plated surface, not easy to rust.2. HEX HANDLE Quick release bit extension rod, with hex handle, can be used for any chuck or electric drill, screwdriver and other tools.3. MULTI ANGLE ADJUSTMENT The multi angle hex shank extension rod can change direction of the drill bit, suitable for small space electric drill operations.4. LOCK RING DESIGN By adjusting the lock ring, it can be used in linear or rotating mode, suitable for professional electricians and carpenters.5. CONVENIENT AND SAFE Easy to install and use, improve work efficiency, safe and efficient, quickly drill and install screws, saving a lot of time.Specification:Item Type: Drill Bit HolderMaterial: Chrome Vanadium SteelWeight: Approx. 56g or 2ozProduct Length: Approx. 89mm or 3.5inProduct Specifications: Interface: Approx. 6.35mm or 0.3in, Shank Diameter: Approx. 6.35mm or 0.3inScope of Application: Home decoration, electric drills, etc..Package List:1 x Drill Bit HolderNote:1. Please allow 0and 8209 1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.