Our tactile metal dome switches pictured here are but a few types we manufacture at Liberty Technologies. These metal domes, when used with a printed circuit board, provide a normally-open momentary contact switch. The circuit board has an inner and outer circuit path which the center of the dome closes when manually pushed.  The domes are positioned on the circuit board and typically held in place with a pressure sensitive adhesive tape. Liberty can provide your desired push and release force domes for your application.