Micro Drill Adapter 1/8" Keyless Chuck Features include... 0 - 1/8" Chuck Capacity Precision sensitive drill adapter Finger control Reduced Drill Breakage Easier small hole drilling Consistent precision operation, runs without down time. Multiple operations on a single set up Applicable in mills lathes, drill presses and jig borers. 1/2" straight shank for ease of use in your machine with collet or chuck 3/4" travel Easy operation, grasp free turning ring, feed with gentle finger pressure, auto return upon release Has 0 JT male taper.