1. Alloy spring steel has high elasticity high strength good clamping and fastening and stable cutting. 2. After high-frequency quenching treatment good low-temperature impact toughness and good clamping performance make clamping more stable. 3. Based on Proven Taiwanese technology, We also use the imported CNC griner which make sure of the stable precision product. 4. Guide Bush of Main & Sub Collet (Hardness Rigidity≥92HRC) 5. Our products are good for imported CNC machine tools like TONORS, SECO, CITIZEN, TSUGAMI, STAR, NOMURA and so on.