Drill fi 4.2mm HSS Co for M5 threader

Professional cobalt drill bit for metal HSS-Co fi 4,2 mm - collective package is 10 pcs. CNC PROFI HSS-Co drills are top quality drills that are made of HSS Co high speed steel with 5% cobalt content. In addition, they also contain chromium and molybdenum, which increases the drill bit's resistance to abrasion and high temperatures. The HSS-Co fi 4.2 mm drill has a hardness of 64 HRC and retains 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 steel.