Commercial Specification Grade. For use in shops, garages, and other work areas with hard floors. Rugged armored husk and cord clamp protects against chipping and cracking. Triple combination screws. Husk and wiring module keyed for easy alignment during assembly. 2-piece steel strain relief clamp centers cord for neat installation. Can be used with 18-3 to 12-3 cables. Yellow. UL (Underwriter's Laboratories) listed.