Leviton 4550 15 Amp, 250 Volt, Duplex Locking Receptacle, Industrial Grade, Grounding, Black Super Tough Nylon Body Resists Damage from Severe Impact, Abrasion and Chemicals Ergonomic, Fluted Body Design with Radial Grip Ridge is Ideal for Gripping, Turning and Pulling Cord Clamp Does not Have to be Disassembled from Body for WiringAccepts Wire Mesh Connection Strain Reliefs One-Piece, Rivetless .035" Thick Brass Connector Contacts and Solid Brass Plug Blades Provide Maximum CSA C22.2 No. 42: File LR-406