HSS JOBBER OR TWIST DRILLS ARE THE MOST COMMON OF ALL DRILL BITS FOR METAL.
MANUFACTURED FROM HIGH QUALITY HSS STEEL, THEY HAVE PRECISION GROUND CUTTING EDGES AND GROUND FLUTE WHICH GIVES IT THAT QUALITY YOU NEED IN A DRILL BIT.
AVAILABLE IN - METRIC AND IMPERIAL SIZES.
ALSO VERY POPULAR ARE THE COBALT DRILL BITS USED MORE ON STAINLESS STEEL AND OTHER HIGH ALLOYS.