Collet /Milling Chuck ER-11/ER-16/ER-20/ER-25/ER-32/ER-40 from Jinjie China 1) Made of high quanlity spring steel 2) Powerful clamping ability with high precision and stability 3) Used for drilling, boring, milling, tapping, and so on. 4) Adapted for DIN6499B machine tools, collet, Er collet, spring collet, collet set, collet chuck, 5c collet, R8 collets, machine tool parts, retention knob, milling chuck, nut, ER spanner, pull stud, retention knobs, spanner, ER nut, collet fixture, tool holder and sleeve, milling chuck adapter, peacock, tribos, SINO-T, Schunk, Sandvik, Biltz, Zoller