Farpoint Far-Sight Barska Binocular Mounting ScrewThe Barska mounting screw is sized for Barska binoculars' proprietary tripod socket thread. Like the Standard screw, it threads into your binocular and becomes the pin that mates with the Farpoint Far Sight quick release base but with the thread Barska uses on their binoculars. What it's for If you own Barska binoculars and want to use them with the Farpoint Far Sight, this is the screw you need in place of (or in addition to) the Standard 1 4 20