Features 1、STANDARD AND ACCURATE: The drill chuck arbor features standard morse MT1 shank and accurate 1/2in 15.5mm long thread, easy to install and use. 2、STURDY MATERIAL: Made of premium, quenched manganese steel, the drill chuck arbor is resistant to oxidation, wear and tear, long lasting and reliable. 3、EASY TO INSTALL: The drill chuck arbor adapter allows for quick and easy installation and removal, saving time, convenient to switch between applications. 4、WIDE APPLICATION RANGE: The MT1 drill chuck arbor can be used in various machines such as tapping machines, drilling machines, milling machines, and more, making it a versatile accessory. 5、PORTABLE AND CONVENIENT: The compact design of the threaded drill chuck arbor makes it easy to carry with you wherever you go. Specification Item Type: Drill Chuck Arbor Material: Manganese Steel Model: MT1 1/2 20 Thread Specification: 1/2in, length: Approx. 15.5mm/0.6in Connecting Shank: Morse MT1 Connection Method: Screw Package List 1 x Drill Chuck Arbor