A pushbutton switch is a small, rectangular object, simply used to perform an action that turns on or turns off the circuit, acting as manually-produced signals for controlling contactors, relays and magnetic starters in the area of automatic industry. Greegoo made push button switch can be devided into non-illuminated selector type, emergency stop type with mushroom head, non-illuminated momentary type, double-headed momentary type with screw clamp terminal connections, ect.