The 44506-4720 with Switch Fixings SM06-DL20 is a pushbutton switch manufactured by Omron. It has a 6mm diameter size and a push-in to release mechanism. It is made of durable material for long-term use and is designed to allow you to mount the switch on a panel or other surface using a fixing plate. The switch is also RoHS compliant and has a UL 94V-0 flammability rating, making it safe to use in many different applications.