Built-In protective shutter mechanism designed to prevent the insertion of foreign objects into the receptacle contact openings. Allows easy insertion of properly rated plugs. ; Clearly visible ''TR'' marking on the face of device. ; High impact-resistant thermoplastic cover and body for long service life in commercial applications. ; Slotted, Phillips and Robertson tri-combo screw heads offer greater installation flexibility. ; Green grounding screw and self-grounding clip for automatic grounding in grounded metal wallboxes. ; Shallow design for maximum wiring room in box. ; Washer-type break-off plaster ear for best. ; Self-Grounding ; Push-In and Side Wired