1.High quality elastic steel material with long use time.
2.Shank of the Straight Shank Collet Chuck: 10mm, 12mm, 16mm, 20mm, 25mm, 32mm, 40mm.
4.The precision little than 0.01mm with balance 10,000rpm. Higher precision also can be made by your demand.
6.The protrusion length is difference from 20mm to 200mm.
7.Suitable NUT & Wrench is also upon request.