Lev-Lok Duplex Receptacle Outlet, Heavy-Duty Industrial Specification Grade, Tamper-Resistant, Smooth Face, 20A, 125V, Modular, NEMA 5-20R, 2-Pole, 3-Wire, Self-Grounding - BlackMating Lev-Lok Wiring Module Required for Use. The Lev-Lok Modular Wiring Device System is engineered for fast and easy installation. These devices employ a simple twist and lock wiring module that ensures a safe, reliable connection while at the same time providing for extremely fast and easy installation. Lev-Lok brand wiring devices address the reliability and performance concerns of specification engineers without sacrificing the contractor's need for fast, easy installation. Available in extra heavy duty hospital and industrial grades, and heavy duty commercial grade platform.