Left hand stub drills. Industrial, polished finish, 135 degree split point. Stubby mechanics length drill bit for additional strength. Made form premium cobalt steel. Product Features:Left hand stub drill bit for removal of right hand threaded broken bolts or studs without tightening5 piece set includes 1/8-Inch3/16-Inch 1/4-Inch 5/16-Inch and 3/8-Inch left hand drill bitsIndustrial polished finished with 135 degree split pointMade from premium cobalt steelStubby mechanics length drill bit for additional strength