Features Excellent High Carbon Steel Material: This self tighten drill chuck is made of excellent high carbon steel material, which is strong and wear resistant, not easy to be damaged, and has a long service life. High Clamping Force: This drill chuck increases in response to the force required, and the unique thrust bearing facilitates the application of torsion to the handle to create greater clamping force. Keyless Design: This self tighten drill chuck features a keyless design, tightening and unclamping is by hand force, allowing for faster and easier clamping and unclamping. Wide Application: This keyless hand drill chuck has a wide range of applications and can be used on a variety of drilling machines, milling machines, lathes, boring machines and power hand tools. Compact And Portable: This quick replacement drill press chuck is small in size and light in weight, which is very convenient to carry around and use. Specification: Item Type: Self Tighten Drill Chuck Material: High Carbon Steel packing list: 1 x Self Tightening Drill Chuck 1 x Shank 2 x Storage Boxes Package List 1 x Self Tightening Drill Chuck 1 x Shank 2 x Storage Boxes