10mm Metal Stable Keyed Drill Chuck 1/4 Hex Shank Connecting Chuck Mini Drill Driver Specifications Shank: 1/4'' (6.35mm) Hex Shank Chucks: 3/8'' (1.5-10mm) Item: 3/8-24UNF Length: 90mm Features Drop forged steel. Triple grip drill chuck. Accepts accessories with 1-10mm shanks. Quick Change, Easily locks onto and releases drill bits. Allows hex drive power tools to use conventional drill bits. Key type drill chuck,lock your accessory stable. Color: Chrome Weight(KG): 0.300