Lev-Lok Duplex Receptacle Outlet, Heavy-Duty Industrial Specification Grade, Split-Circuit, 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.