Quick change keyless chucks holds accessories with 1/32inch to 1/8inch sizes.One-piece structure , alloy material, sturdy and durable, more than plastic models. The 3- chuck is -made, and the built-in spring is stable and durable.There are eight sizes of brass 4485 collet to : 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm.Compatible with all tools and for flex shaft.3- chuck compatible for all cordless and corded tools(including drill bits, sanding drums, polishing wheels and other light-duty accessories)Colour:Gold + BlackMaterial:brassPackage Contents:1 set x Drill Chuck Collet Set for Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.