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 .Spec:Item Type: Drill Chuck ArborMaterial: Manganese SteelModel: MT1 1/2 20Thread Specification: 1/2in, length: Approx. 15.5mm/0.6inConnecting Shank: Morse MT1Connection Method: ScrewHow to Use:Directly install and use.PackageList:1 x Drill Chuck Arbor