The Micro Switch is an electric switch that is actuated by very little physical force. By using the micro switch, a relatively small movement at the actuator button produces a relatively large movement at the electrical contacts, which occurs at high speed. It is widely used in many applications like appliances, machinery, industrial controls, and many other places for control of electrical circuits.
This Grove - Switch is a mini SPDT switch which you can use to add an "on/off" option to your project. It is a reliable switch that can be used in anything.