The diameter of the hammer drill chuck for impact driver is 43mm/1.69inch, and the length is 58mm/2.28inch.Large range of clamp size which from 1-13mm,Connection Size:1/2-20UNF.suitable for many kinds of drill bit. This tool a great accessory for your drilling tasks, Drill chuck for impact driver can hold the drill bit firmly. keyless and self-tighten type design is more in accordance with human engineering.You can use this drill press chuck without too much concerns and it helps you work more efficiently. Easy installation ,drill chuck for impact driver Conveniently tighten with Remove the old chuck counterclockwise and screw on the new chuck clockwise to lock it automatically, more convenient and labor-saving. Keyless and self-tighten type design,The chuck can hold the drill bit tightly,You do not need complicated procedures that you can use it. Drill chuck 13mm Constructed with all cast iron Material for durability suitable.Even if you are a long-term practitioner, it can meet your needs.So you don't have to worry about product quality. Colour:Black Material:cast iron Package Contents: 1pcs x drill press adapter for hand drill Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.