Leviton 4792 15 Amp, 125 Volt, Duplex Locking Receptacle, Industrial Grade, Grounding, Lock/Straight Combo, Black Impact-Resistant Black Thermoplastic Nylon Face and Body Smooth Face Does not Collect Dirt Large, Triple-Wipe Brass "T" Contacts for Superior Contact and Conductivity Triple-Combination Terminal Screws Backed by a Limited 10-Year Warranty