Image is Representational - See Manufacturer Specs | Sensing and Control offers the world's most advanced line of MICRO SWITCH™ heavy-duty limit switches. These switches include boss-and-socket head design for secure head-to-body retention unique all-metal drive train for consistent operating characteristics even at high temperature (lasts longer without the need for frequent adjustment than drive trains with plastic parts ) self-lifting pressure plate terminals save wiring time easily identified grounding terminal (inside) for compliance