One-piece structure design, alloy material, sturdy and , more than plastic models. The 3-jaw chuck is well-made, and the built-in spring is stable and . Compatible with all rotary tools and for flex shaft. Quick change keyless chucks holds various accessories with 1/32inch to 1/8inch shank sizes. 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. 3-jaw chuck compatible for all cordless and corded rotary tools(including drill bits, sanding drums, polishing wheels and other light-duty accessories), Weight: 0.04850169764 pounds, Manufacturer: HuddleGlow