1. HSS Straight Shank Twist Drill Bits 2.left hand drill bits 3.ASME B.94.11M 4.9341 material 5.118 point HSS Straight Shank left hand Drill BitsProducttion technics : fully ground,roll & polished, roll forged,Milledmaterial:M42,M35,6542,9341,4341,4241standard : DIN338/340/1897 ,ASME B.94,11M---1993split point: 1180/1350Surface finishing: Black oxide, bright, tin coating, rainbow color size: 1/16 ...