Quick change keyless chucks holds accessories with 1/32inch to 1/8inch shank sizes. One-piece structure design, alloy material, sturdy and durable, more than plastic models. The 3-jaw chuck is well-made, and the built-in spring is stable and durable. There are eight sizes of brass 4485 collet to choose: 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm. Compatible with all rotary tools and for flex shaft. 3-jaw chuck compatible for all cordless and corded rotary tools(including drill bits, sanding drums, polishing wheels and other light-duty accessories) Colour:Gold + Black Material:brass Package 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.