Easily lock and release the drill bitMaterial: high speed steelThread installation: 1/2 inch 20 UNF (about 9.53mm)Capacity: 2mm to 13mmTotal size: 42x74mm (Max D * H)quantity: 1feature:The handle is easy to turn by hand, so the output torque becomes larger.Can be used with any 1/2 inch 20 bracket.With 1/2 "-20 thread, suitable for many drill models and brands.Package Included:1 x 1/2-20 drill chucknote:1. Since it is a manual measurement, please allow a slight error. Make sure you don’t mind bidding.2. The color difference display may be different, please understand.