Hubbell Wiring Device-Kellems extra heavy duty single blade receptacles are used in factories, manufacturing plants and office buildings allowing connections of matching straight-blade plugs with an electrical supply. They feature unique bypass contact design for greater contact force & reduced heat buildup. They have one-piece, nickel-plated brass integral ground straps for excellent corrosion resistance. These receptacles further have an RTP base that offers contact stability, available in 5-20P & 5-20R NEMA configurations on Raptor Supplies.