Mechanical units in the nature of nut runners, screwdrivers and power driven wrenches being parts of industrial fastening and tightening machines; Mechanical unit systems comprised of electric nut runners or screwdrivers or wrenches featuring electric controls; Tools for industrial fastening and tightening machines, namely pneumatic nut runners, pneumatic screwdrivers and power-driven wrenches; Drives for industrial fastening and tightening machines and tools namely pneumatic nut runners, pne...