<p> Push button Switches, also known as biased switches, work on simple electric switch mechanism. Push-button Switches are a type of momentary switch in which the user push-for "on" or push-for "off" to control some aspect of a machine or a process. The buttons are usually made of metal or plastic and deliver instant response. A push button switch is used in a variety of mechanical and electronic devices and various other home and commercial appliances. </p> <p>AML21FBA2AC Honeywell switch is a momentary action push button switch with DPDT circuitry. This switch comes with a choice of silver or gold contacts.</p>