Tact switches are everywhere and they are especially popular on DIY electronics and microcontroller boards because they are well suited to act as a Boot Option or Reset Switch.This switch has round handle. Particularly, momentary switches doesnot save their state when you depress the switch. That is, when you push the switch the circuit is ON, but once you let off the switch it reverts back to OFF. Tact switch are heavy,strong plastic material. It is used in many applications like DIY projects, Reset switch,Restart switch,Electrical or electronic mini or major projects.