Fully ground hss cobalt drill bits manufactured to din 338 efficient clog free swarf clearance suitable for drilling high carbon steel and stainless steel fully ground hss drill bits manufactured to din 338 135 degrees split point is self centring which helps to reduce thrust friction and heat and aids an easier penetration clog free sward clearance suitable for use with both hand and pillar drills particularly on high carbon steels and copper available as a 19 25 or 170 pieces set or in p