DESC: Versatile Binocular Adapter Slim, super-rigid neck makes this adapter suitable for mounting either porro-prism or roof-prism binoculars on a tripod. Holds binos of 80mm or smaller. Threaded 1/4"-20 socket fits standard tripod heads. Height 3-5/8". Large L-Adapter Couples binocular to tripod head. Captive 1/4"-20 bolt threads into receptacle in binocular bridge. Aluminum.