Item Type: Collet Chuck Holder Material: 40cr Alloy Steel Accuracy: 0.003mm Spindle: BT30 Applicable Collet: SK16 Package List 1 x Collet Chuck Holder 1Good Wear Resistance: Using excellent 40cr alloy steel material, has better wear resistance and more stable performance. 2High Hardness: Quenched and hardened, the bracket has high concentricity, improved hardness and has good comprehensive mechanical properties. 3Resistance Reduction: Designed with no slotted nut, resistant to wind, reduce interference and vibration, make high speed processing more stable. 4High Centering Precise: The shank hole adopts fine grinding process, has high centering precise, the surface is polished, has beautiful appearance. 5Good Rigidity: Integral molded, the holder has good structural rigidity, the pressure is dispersed on the precise needle roller of the cage, suitable for large cutting amount processing.