Traditional heavy duty grade combination switch with receptacle features UL listed Tamper Resistant shutters designed to prevent the insertion of foreign objects. TR274 features a neon pilot light which is On when switch is On. Switch is horsepower rated for motor loads per UL 20. Thermoplastic toggle, top and backbody are virtually unbreakable to deliver years of durable performance. Ultrasonic welding and integrated construction of the strap and body provide superior ground integrity even under heavy use. Durable, injection molded housings and PVC resin comply with UL94 V0 flammability ratings. Tri-combo screw heads offer greater installation flexibility.