This ER32 balance collet is made of high quality material. Great processing and fine making, it could absorb the shocking and the impact power. Easy to install and use, a great choice for you. Features: Made of high quality manganese steel material, this product is sturdy and durable. High strength and high hardness, not easy to deform. Great processing and fine making, it could absorb the shocking and the impact power. Lightweight and small size, easy to install and operate. Widely used on drilling machines, grinding machines, lathes, and other processing machines. Specification: Condition: 100% Brand New Item Type: ER32 Balance Collet Material: Manganese Steel Style: 6-5, 8-7, 10-9, 12-11, 14-13, 16-15, 18-17, 20-19 Size: Approx. 10 * 10 * 5cm / 3.9 * 3.9 * 2.0inch Weight: Approx. 1180g / 41.6oz Package List: 8 * ER32 Balance Collet1?Made of high quality manganese steel material, this product is sturdy and durable. 2High strength and high hardness, not easy to deform. 3Great processing and fine making, it could absorb the shocking and the impact power. 4Lightweight and small size, easy to install and operate. 5Widely used on drilling machines, grinding machines, lathes, and other processing machines.