7 machine tools for metal working, namely, forming and shaping dies, machines, namely, piercing/forming units to punch and pierce sheet metal, rotary benders; machine tool parts for metal working, namely, work piece guides, punches, cams, gas springs, punch holders for holding sheet metal punches, screws, dowels, work piece manipulators, punch plates, spring plates, hydraulic pumps, angle pushers for applying pressure against sheet metal, and piercing machines for piercing sheet metal, stop blocks, stop rings, hydraulic pistons, flangers, rockers, saddles, gibs, and assemblies of two or more of the foregoing items