Made of high quality plastic and metal materials, environmentally friendly, safe, sturdy and durable 4 screw terminals, 1 NC DPST contact type, red mushroom emergency stop push button The switch is compactly structured and operates quickly and smoothly Can be widely used to control electromagnetic starter, contactor, relay and other automatic control electrical circuits Press the red button to activate the emergency stop, turn the red button until it bounces to restore the brake.