13pcs HSS Twist Drill Bit Sets ISO2000 CERTIFICATED Black,White,Tin SIZES:(1/16"-1/4")X1/64" Long life, fast speed 13PCS ... finished TY-H1311-6 fully ground, tin coated SIZES:(1/16"-1/4")X1/64" PACKING: inner: BFC outer: carton N ... about HSS drill sets, sds hammer drill sets,masonry drill bit sets, wood drill sets, auger bits sets, or another drill ...