Alloy material, One-piece structure design, sturdy and , more than plastic models. The three-jaw chuck can hold these tiny bits more securely at high speeds, and the built-in spring is stable and . Quick change keyless chucks holds various accessories with 1/32inch to 1/8inch shank sizes. Alloy steel material, wear-, more and safe than other plastic materials. Use with brass collets, Strong adaptability, lmproved accuracy. Drill chuck collet set compatible with most rotary tools you meet on the market. Easy and quick to change accessories without changing rotary tools, including drill bits, buffing wheels, three-edged knife, cut-off wheels, and more. Made of high-quality brass material, tough, more sturdy and , not easy to bend, 4 Claws design and workmanship strong holding power and hold the drill bit more firmly, more size of clamping diameter make them more versatile. You get 28pcs drill chuck collet, including replacement keyless chuckX2, metal collet nutX4, brass 4485 colletsX20, super-thin open end wrench X1, L-wrench X 1., Weight: 0.07385485777 pounds, Manufacturer: Tuesoa