Drill fi 6.8mm HSS Co for M8 threader

Professional cobalt drill bit for metal HSS Co fi 6,8 mm. The collective package is 10 pcs. CNC PROFI HSS Co drills are top quality drills that are made from HSS Co high speed steel with 5% cobalt content. They also contain chromium and molybdenum, which increases the drill bit's resistance to abrasion and high temperatures. The drills have a hardness of 64 HRC and retain it at high temperatures. Professional cobalt drills are recommended for machining hard acid-resistant steel and for machining hard-to-cut steels. They are designed for: machinable steels, cast iron, alloy steels, aluminum, stainless steels.