1、STABLE CLAMPING: This chuck for round die is precisely manufactured, with high mechanical performance, will provides firm and stable clamping. 2、STANDARD SIZE: This round die chuck is standard in size, the outer diameter of the interface is 30mm, and the maximum thread depth is 55mm. 3、CARBON STEEL MATERIAL: Made of carbon steel, quenched and blackened, the chuck has strong oxidation resistance, high hardness and long service life. 4、EASY INSTALLATION: This chuck allows quick and easy installation and removal, saves you a lot of time when switching between applications. 5、WIDE APPLICATION: This round die chuck can be widely used in tapping machine, drilling machine, milling machine, boring machine, pneumatic tool, etc.