Features High Hardness and Stable --- The threaded milling drill chuck arbor has high hardness and longer service life. MT3 Shank to 3/8in‑24. Connection Way --- This drill chuck arbor is connected by screw connection, so that you can have simple operation and use in the actual process. Made of Manganese Steel --- The threaded drill chuck arbor is made of excellent manganese steel with blackening face and high resistance to oxidation. Easy Installation --- This drill chuck arbor allows for quick and easy installation and removal, saving you time when switching between applications. Wide Use --- Our high accuracy drill chuck arbor is widely used in tapping machines, drilling machines, milling machines, boring machines, pneumatic tools, etc. Specification: Item Type: Drill Chuck Arbor Material: Manganese Steel Connecting Rod: MT3 Connection Method: Screw Package List:1 x Threaded Drill Chuck Arbor 1 x Storage Box Package List 1 x Threaded Drill Chuck Arbor 1 x Storage Box