Features 40cr Alloy Steel: The chuck bracket is made of 40cr alloy steel, which has better wear resistance and more stable performance. High Hardness: The chuck bracket is quenched to make it harder and more concentric, so that it has good comprehensive mechanical properties. Wind Resistance Reduction Design: Non slotted nut, wind resistance reduction design, reduce interference, reduce vibration, and make high speed processing more stable. Surface Treatment: The surface of the chuck bracket is polished to be beautiful and elegant, and the shank hole is finely ground with high centering accuracy. Integral Forming: The chuck bracket is integrally formed, and the structure is rigid. When in use, the pressure is dispersed on the accuracy needle rollers of the cage, which is suitable for large cutting amount processing. Specification: Item Type: Milling Collet Chuck Holder Material: 40cr Alloy Steel Model: BT30 SK16 60 Accuracy: 0.003mm Spindle: BT30 Applicable Collet: SK16 Package List:1 x Milling Collet Chuck Holder Package List 1 x Milling Collet Chuck Holder