Collet Set for accurate use on round components

One each 2.0 - 3.0 - 4.0 - 5.0 - 6.0 - 8.0 - 10 and 12 mm are included. Concentric accuracy better than 0.2 mm, much better than a chuck. One soft collet for making a custom size yourself. The included collet attachment is mounted in the place of the headstock chuck.