7/16 ER25 Spring Collet Collet chuck CNC Milling lathe SN-T,lathe SN-T 7/16 ER25 Spring Collet Collet chuck CNC Milling, Made of high grade specially formulated spring steel, Hardened and precision ground, Built in self-Release design and tools will never get stuck in holder,Clamping Range : 0,004" Accuracy : 0,0005 collets Size : D"25mm , D1"26mm , L" 34mm,Product Description 1 of 7/16 ER25 Spring Collet Collet chuck CNC Milling lathe Brand New PRECISION ER25 SERIES SPRING COLLETS , Milling lathe SN-T 7/16 ER25 Spring Collet Collet chuck CNC.