Sensitive Hand Drill Feed & 1/8" Keyless Drill Chuck The drill feed has a 1/2" diameter hardened and precision ground 0JT straight shank. It allows for grasp free turning ring and feed drill. The drill feed is spring loaded with 3/4" travel and fits any drill, mill, lathe or jig borer. Using a hand drill feed reduces small drill breakage. The drill feed and the drill chuck both have a TIR of .002". Included is a 0-1/8"/0-3mm JT0 keyless drill chuck. This drill chuck is precision made with highest T.I.R. and has ultra-smooth bearings.