Push-button also called pushbutton tactile switch or simply button is a simple mechanical switch to control any signal or device. The switch is normally open or disconnected. After pressing or pushing it gets connected to the circuit and allows signal or current to pass through.
This switch is mostly used in input devices. The switch is made of plastic and metal. Buy push button switch from RoboElements of 2 pins with high-quality material and use in breadboard or PCB.