straight shank collet chuck with mini nut

1.Adopt high strength special material, through cryogenic treatment, the product performance is stable,wear-resisting and durable.
2.Long shank,suitable for deep hole processing
3.Can reduce the use of lengthened tools, reduce costs,improve efficiency
4.Precision grinding,effectively ensure high precision
5.Nut directly tightened, high rigidity, strong blessing force.