1、Stable Clamping: This is a round die tapping chuck, precisely manufactured, with high mechanical performance, will provides firm and stable clamping. 2、Standard Size: This round die tapping chuck is standard in size, the outer diameter of the interface is 31mm, and the maximum thread depth is 72mm. 3、Carbon Steel Material: This chuck is made of carbon steel, the surface is quenched and blackened, with strong oxidation resistance, high hardness and long service life. 4、Quick Installation: This round die tapping collet allows quick and easy installation and removal, saves you a lot of time when switching between applications. 5、Multi Purpose: This high precise round die chuck is widely used in tapping machine, drilling machine, milling machine, boring machine, pneumatic tool, etc. 1 x Round Die Tapping Chuck1 x Hex Wrench Item Type: Round Die Tapping ChuckMaterial: Carbon SteelInterface Outer Diameter: Approx. 31mm/ 1.2inMaximum Thread Depth: Approx. 72mm/ 2.8in