HSS-Co Heavy Duty Cobalt Stub Drills. Series 2010 Metric Heavy duty drill made of cobalt material with excellent heat resistance. For drilling steels up to 1,400N/mm2, stainless steel, heat resistant steels and bronze. Ideally suited for volume production on automatics. Point angle: 135°, helix angle: normal, web thickness: strengthened, tolerance of diameter: h8, tolerance of shank: f11. Manufactured to BS 328, DIN 1897RN. Point to DIN 1412C.