Lev-Lok Duplex Receptacle Outlet, Extra Heavy-Duty Industrial Specification Grade, Smooth Face, 20A, 125V, Modular, NEMA 5-20R, 2-Pole, 3-Wire, Self-Grounding - Gray Mating Lev-Lok Wiring Module Required for Use Calculate Time and Money Saved with the Lev-Lok Savings Calculator! 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 platforms.