1、Carbon Steel Material: Made of premium carbon steel, and the quenched and blackened surface, this chuck possesses strong oxidation resistance, hardness and long service life. 2、Easy Installation: Circular die threading of this chuck allows quick and easy installation and removal, saving you time when switching between applications. 3、Wide Application: This chuck is widely used in tapping machines, drilling machines, milling machines, boring machines, pneumatic tools, etc. 4、Better Designs: This chuck is designed with 30mm outer diameter and 55mm maximum threading depth, you shall pay attention to the size you need. 5、Ideal Replacement: This chuck can be easily installed, ideal replacement for the old and damaged parts. Item Type: Thread Die Chuck Material: Carbon Steel Outer Diameter of Interface D: Approx. 30mm / 1.18in Internal Diameter of Plate Tooth d: 30mm / 1.18in Die Height: Approx. 10mm / 0.39in Maximum Threading Depth: Approx. 55mm / 2.17in 1 x Thread Die Chuck 1 x Hex Wrench