Features 1、This product is suitable for any size 5C collet from 0.16 ~ 2.86cm / 0.1 ~ 1.1in. 2、The rolling and pinion designed is like a 3‑jaw chuck operated by Chuck Kay. 3、Rolling and pinion gears are accurately machined and hardened and are very durable. 4、With complete tools, you can operate it yourself, very convenient and practicality. 5、The chuck can perfect replacement for the old one by exquisite workmanship. Specification Item Type: 5C Collet Chuck Outer Diameter: Approx. 12.7cm / 5in Can use any size 5C collet from approx. 0.16 ~ 2.86cm / 0.1 ~ 1.1in Speed: up to 6000 Accuracy: 0.0006 TIR Size: Approx. 12.5 x 11cm / 4.9 x 4.3in Package List 1 x 5C Collet Chuck 3 x Screw 1 x Chuck Wrench