419GY GROUND. ADAPTER, GRAY | Grounding adapter with grounding lug converts 2-pole polarized outlet to 3-wire grounding outlet. Grounding lug fastens to wallplate mounting screw for excellent ground connection. Safety tab extends face on adapter to assure grounding plugs can not be plugged in incorrectly. Polypropylene body resists dirt and marring. Ribbed body for sure insertion and removal. Solid brass blades for long life and low heat rise at full load.