1-piece fluted sleeve construction. Ball trust bearing reduces friction in chuck closing mechanism. Through-hardened sleeve teeth, nose, and keyholes for wear resistant. Maximizes gripping force and drilling accuracy. Treated to ensure thread life and high gripping surface hardness. Jaws center-ground for absolute straightness and alignment. Material(s): Steel
Drill Bit Range [Min]: .040"
Drill Bit Range [Max]: .50".
Unit of Measure : Each