You Can Use This Multi-purpose Adapter With Just About All Your Chucks. 3 /32' Shank With Collet; Holds Small Items. Includes One Chuck (0 - 2 1/2mm.) You'll Be Delighted To Add This Item To Your Tool Box.* Inlcudes One Chuck 0-2.5mm * Multi-purpose * Works With Many Chucks * 3/32" Shank With Collet * 2.75" Long