Review on Leviton 4155 51 Incandescent Lampholder 660W 250V by German Diaz

Looked good out of the box, but with the screw terminals so close to the pivot pin it is almost impossible to tighten the stranded wire (e.g. 99 % of all lamp wire in the US) without pressing some threads against the spinning pin to keep it from spinning. If you get close, but not quite, you'll find that the handle is difficult, but not impossible, to turn until the extra friction caused by the friction wires causes the plastic thread inside the handle to break. You can then epoxy seal the handle again, but after several attempts to install the wire so that it doesn't rub at all against the rotating pin, the threads holding the terminal screw were stripped. Then you have to throw everything in the trash and look for another brand.