Manufactured from HSS-E cobalt steel with 3 flutes for effective cutting and stock removal, suitable for deburring and chamfering of most metals and plastics. Features and Benefits Manufactured from HSS-E cobalt steel for increased toughness 3 flutes for increased cutting performance 90 Inclusive angle for effective countersinking Suitable for deburring and chamfering Typical Applications Countersinking Deburring Chamfering Standards Manufactured to BS 328: Part 5:1983