Specification: Model: MT4 ER32 M16 Compatible Devices: Milling Machine Thread Size: M16×2 Shank type: MT4 Collet type: ER32 Traction line: M16 Included Components: Chuck Holder Material: Carbon Steel Product Function Description: This product has undergone rigorous quality testing. Durable and easy to install and replace. The most cost-effective and best after-sales service. Quality assurance that gives you peace of mind. Features: .