Superior to Cobalt, this product is a new development from Norseman CTD and Viking, you aren't going to find it easily but we have it in stock! Super Premium 29 Piece Magnum Drill Bit Set is built for exceptional drilling performance. Drill bits are cryogenically frozen, making them extremely hard and extremely sharp. Cryogenic treatment creates a more uniform "grain" structure by transforming retained austenite into martensite. Modified carbon micro-structure through precipitation of carbides makes these bits extremely sharp and resistant to wear. The Nitride process diffuses nitrogen into the surface to create a case hardening resulting in superior tool life and exceptional corrosion resistance. Recommended for work hardening grades of stainless steel and other hard metal drilling application. These bits are built to last!