Made of excellent carbon steel material with black treatment, come with strong oxidation resistance, high hardness and long service life Threaded chuck allows for quick and easy installation and removal, saving your time when switching between applications Collet chuck can be mounted to a backing plate of for use on a lathe or as a fixture on a mill The flange adopts a seven hole structure, which can firmly lock your milling machine during use, not easy to loosen, and has higher operation accuracy Collet diameter is 100mm, used for CNC milling tools, and lathe, useful and practical, Manufacturer: Jnchdghwa