1. Product use: By connecting the taper hole drill chuck, so as to connect with the machine , and the flat position is convenient for disassembly from the machine .2. High concentricity when working with the corresponding drill chuck.3. Can be adapted to a variety of drilling machines, milling machines,lathes and so on.4. not easy to rust, wear resistant, long service life.5. designed, beautiful appearance, easy to use.Specification:Item Type: Morse Taper Drill Chuck ArborModel: MTB3-B16Hardness: HRC-55Accuracy: less than or equal to 0003colour: silverMaterial: steelPackage Contents: 1 X Drill Chuck ArborOnly the above package content, other products are not included.Note: Light 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.