Features: It provides great process ,fine and elaborate manufacture. It is made of high speed steel,rust-resistant and has long service life. It is suitable for drill,grinding and lathe machine center. It has high rotation speed which reaches 30000r/min. It is stable and has great performance while using. Specification: Rotation Speed:30000r/min Color:Silver Height:120mm/4.72in Width:50mm/1.97in Material:High Speed Steel Package List: 1*ISO30 Balance Collet Chuck 1It provides great process ,fine and elaborate manufacture. 2It is made of high speed steel,rust-resistant and has long service life. 3It is suitable for drill,grinding and lathe machine center. 4It has high rotation speed which reaches 30000r/min. 5It is stable and has great performance while using.