20 & 30 Amp, 125/250, 250, 480 Volt, 3 Pole, 4 Wire, Industrial Grade Locking Plug, Grounding

The locking plug wiring devices are designed for industrial and commercial applications. The nylon housing of the insulated design shields exposed metal parts on the hand-held side. The industrial strength contacts resist heat rise and provide excellent conductivity. The internal dust shield design keeps terminals free of contaminants.