The BlueSpot Nut Riveter Kit, 86 Piece (M3-M8), is designed for applying steel and aluminium rivet nuts. It includes eighty nut rivets and five riveting nozzle sets, all housed in a plastic carrying case. The kit comes complete with a rivet nut gun and five mandrels corresponding to the rivets included. The contents are: 20 pieces of M3 rivet nuts, 20 pieces of M4, 20 pieces of M5, 10 pieces of M6, and 10 pieces of M8.