This ring set for 80mm finderscopes comes with a quick release dovetail shoe that mounts directly to the Stellarvue clamshells using two screws. It also mounts to the Stellarvue dual speed focuser using a single screw. It does not mount to the 2” Feather Touch focuser since the Feather Touch does not have any mounting holes. This is the one to choose for mounting the finderscope to a Dobsonian telescope either on a flat board or to a strut tube. It is our lightest finderscope ring system.