Leviton 30 Amp 125V Black Industrial Grade Locking Outlet Receptacle is a single flush locking receptacle. Its durable design is ideal for industrial use. It features a mounting strap made from extra thick 0.50-inch nickel-plated brass to withstand damage. This receptacle has 1-piece 0.040-inch brass, high copper content contacts with nickel-plated clamp-type terminals. It is made to be used with a 1.60 diameter wall plate.