[4486 Drill Chuck]Quick-change keyless chucks can hold a variety of Mini drill bits ranging from 1/32inch to 1/8inch, no need to change rotary tools frequently. Crafted from premium alloy material, one-piece construction design and built-in spring structure of the 3-jaw chuck more stable than plastic models. [Brass Collets]Fitted with 11 sizes of brass collets: 0.5/0.8/1.0/1.2/1.6/1.8/2.0/2.2/2.4/3.0/3.2mm, meet your different needs. Constructed from high-quality brass, these collet nuts are robust and resistant to bending. The 4-claws design ensures powerful gripping, firmly holding drill bits in place. [M8 Metal Collet Nut] This all-metal nut not only change the collet, but also improves accuracy and efficiency of use. Made of alloy steel, these nuts are wear-resistant, more durable, and stronger than the plastic nut. [Drill Chuck Collet Set]Brass Collets Set with 4 Claws design and high precision craftsmanship ensure strong holding power, easily replace rotating tool accessories. They can change the clamping capacity of an electric grinder in just a few seconds, making it even more versatile. [Widely Compatible]This drill chuck collet set is compatible with most 4486 rotary tools available on the market. Whether it's a drill, polishing wheel or cutting wheel etc, it's easy to handle. Suitable for electric grinders, drills, extension flexible shafts, engraving machines and other polishing and sanding tools. Colour:As Shown Material:brass Package Contents: 1 x Keyless Chucks 2 x Metal Nuts 11 x Brass Collets 1 x Open End Wrench 1 x L-wrench 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.