Strong brass material: Compared with those soft and easy to bend metal or aluminum alloy, our brass chuck is made of high-quality brass material, which is more solid and elastic. You don' have to worry about them breaking during use.High precision and stability: The brass chuck solves the blind area of the clamping path. Even in the case of high-speed rotation, the 4-jaw brass chuck can firmly clamp the tiny drill bit.8 sizes of brass collets: The brass collet set includes 8 sizes of 4-jaw brass collets for . Diameter: 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm. They are compatible with most rotation tools. Please confirm the size you need before purchasing.Three jaw keyless chuck: The three jaw keyless chuck holds the auxiliary drill bit with a 1/32inch to 1/8inch handle. The alloy material makes it stronger and safer than the plastic material. It is compatible with cordless and wired tools, such as drill, sanding drum, polishing wheel, etc.Colour:as shownMaterial:brassPackage Contents:8 x brass 4485 chucks with dimensions of 0.8mm-3.2mm1 x metal replacement chuck nut,1 x 1/32inch to 1/8inch quick replacement keyless chuckOnly 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.