Usage Tips:[Universal 3 Jaw Design] Classic three jaw design securely holds a wide range of bits with sizes ranging from 1/16 inch to 3/8 inch [DURABILITY]The chuck is high precision threaded and tapered tightly with rust-resistant Cr-coated body and sleeve electrophoretic enameling coating. All the extensions are applied with rust-proof finishing for extended service life [Jaw Tightening Key]Easily open and close the three chuck jaws using the Jaw Tightening Key [Perfect Combination]Great for holding drill bits, small turnings, dowels, pen mandrel shafts, and much more. Material:High speed steel colour:Silver Package Contents: 1 * B16 16mm chuck 1 * MT2 handle 1 * drill chuck key / 1 * B16 13mm chuck 1 * MT2 handle 1 * drill chuck key Only the above package content, other products are not included. Note: Light shooting 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.