This comprehensive riveting kit converts from the standard riveter to a heavy duty nut riveter capable of handling up to 12mm and the male version of the Rivnut, the new Rivbolt. A professional tool for any situation where heavy duty riveting is required. Unique tool for nut rivets and bolt rivets, supplied in blow mould case. Spare mandrils, M12 sleeve seat and nut riveter sleeve seat available. Extendable arms for extra leverage. 14 Heads Handles: Stainless Steel rivets: 3.2 | 4 | 4.8 | 6.4mm, nut rivets: 4 | 5 | 6 | 8 | 10 | 12mm, bolt rivets: 4 | 5 | 6 | 8mm. Not suitable for M12 Stainless Steel RivNuts