Features [Safe Connection] The Mt1 Drill Chuck Arbor Has A Secure Screw Connection to Ensure A Stable And Safe Connection Between The Drill Chuck And The Machine. [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. [Manganese Steel] The Drill Chuck Is Made of Manganese Steel, The Surface Is Oxidized And Blackened, with 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 Material: Manganese Steel Model: MT1 1/2 20 Thread Specification: 1/2in, length: Approx. 20mm/0.8in Connecting Shank: Morse MT1 Connection Method: Screw Package List: 1 x Drill Chuck Arbor Package List 1 x Drill Chuck Arbor