Machining > Milling > Square End Mills | Bordo Long Threaded HSS Cobalt End Mill - Metric | Bordo Long Threaded HSS Cobalt End Mill - Metric | HSS-Co8 (Cobalt) end cutting, long threaded. | End Mills can cut in both axial and radial directions. | End mills are used in milling applications such as profile milling, tracer milling, face milling, and plunging. | Can be used in much harder materials than slot drills. | Four flutes (6 in larger diameters) result in a high quality surface finish.