FEATURES AND BENEFITS: • Thermoplastic dual mechanism shutter system to help prevent insertion of foreign objects. • Exclusive patented feature, circuit label on face allows permanent circuit identification. • Extra heavy-duty brass, one-piece mounting strap with integral ground. • One-piece, brass, triple-wipe power contacts for lasting retention. • Strap tabs wrap around and lock down on face to prevent strap from separating from face and back body. • Impact-resistant nylon face and back body. • Easily accessed break-off, line-contact connecting tab for fast, easy split-circuit wiring. • Two drive screws anchor strap to back body and face. • Exclusive patented feature, external screw-pressure-plate back wire clamp on ground terminal for faster, easier installation. • External screw-pressure-plate back wire clamps with #10 brass terminal screws for visual assurance of a good connection. • Auto-ground clip assures positive ground.