latest wiring device family is a revolutionary design called the Lev-Lok Modular Wiring Device System. It consists of a wiring module (locking connector with leads) and a rugged wiring device (receptacle or switch) with solid brass locking connection pins. Place the wiring module over the device's locking pins, twist clockwise and the connection is secured. modular devices address the reliability and performance concerns of specification engineers without sacrificing the contractor's need for fast, easy installation. 20 Amp, 125 Volt, NEMA 5-20R, 2P, 3W, Modular Decora Duplex Receptacle, Tamper-Resistant, Straight Blade, Hospital Grade, Isolated Ground, Modular Terminals, Plated Steel Strap, Lev-Lok, Gray.