Features [Mt3 Center]: Mt3 Half Notched Dead Center, Integrated Forming, Without Burrs, Designed Specifically for High Speed Lathe And Cnc Lathe. [Easy Installation] The Drill Chuck Arbor Can Be Installed And Removed Quickly And Easily, Saving You Time Switching Between Applications. [Durable Design] This Drill Chuck Arbor Features A Solid Design And Construction to withstand Heavy Use And Provide Reliable Performance. [High Carbon Steel] The Drill Chuck Is Made of High Carbon Steel, Which Has Strong Oxidation Resistance, High Hardness And Long Service Life. 【Wide Application】Suitable for A Variety of Machines, Including Tapping Machines, Drilling Machines, Milling Machines, Boring Machines, Pneumatic Tools, Etc. Specification: Item Type: Drill Chuck Arbor Model Number: MT3-1/2-20 Material: Manganese steel Thread Specification: 1/2in, Length: Approx. 20mm / 0.79in Connecting Rod: Morse MT3 Connection Mode: Screw Package List: 1 x Drill Chuck Arbor Package List 1 x Drill Chuck Arbor