Back and side wired, self-grounding. Extra heavy-duty duplex, brass strap with integral ground contacts. NEMA type 5-15R. Impact-resistant thermoplastic nylon cover and body. Smooth face does not collect dirt. Four corner latches securely fasten face. Large, triple-wipe, brass T-contacts for superior contact and conductivity. Back and side wiring options. Brass terminal screws to reduce conductor oxidation. Break-off tabs for easy two circuit conversion. Apron barrier to prevent accidental contact between terminal screw heads and metal box. Exclusive V-shaped, serrated back-wiring clamps for superior contact and conductivity. Wire lead receptacles for fast and easy installation. Backed by a limited 10-year warranty.