1. Product use: By connecting the taper hole drill chuck, so as to connect to the machine tool, and the flat position is convenient for disassembly of the machine tool. 2. High concentricity when working with the matching chuck. 3. Can be adapted to a variety of drilling machines, milling machines, lathes, etc. 4. Not easy to rust, wear-resistant, long service life. 5. Professional designed, beautiful appearance, easy to use. Specification: Item Type: Morse Taper Drill Chuck Model: MTB3-B16 Hardness: HRC-55 Accuracy: less than or equal to 0.003 Color: Silver Material: Steel Package Contents: 3 x Drill Chuck Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.