Commercial grade, tamper-resistant nylon, single grounding receptacle. Shutter mechanism inside the receptacle blocks access to the contacts unless a 2-prong plug is inserted, ensuring that items such as hairpins and keys will be locked out. Features a narrow body, back and side wired, and large-head terminal screw that accepts up to No. 10 copper wire. Triple wire power contacts for maximum conductivity and plug retention. Captive mounting screws for fast installation, convenient washer-type break-off plaster ears for best flush alignment. Break-off tabs for easy 2-circuit conversion. Heavy-gauge rust-resistant steel mounting strap. Limited 10 year warranty.