The RRS-9000520 by Really Right Stuff enables your binoculars to be tripod mounted and is perfect for extended glassing sessions. It utilizes a quick release system which is compatible with most binoculars with a housing diameter between 1.77” – 2.56”. The base of the RRS-9000520 features Really Right Stuff’s 1.5” dovetail, allowing the majority of tripod users to quickly attach/detach their field glasses from multiple ball head manufacturers. The RRS-9000520 also features a 1/4"-20 mounting socket on the bottom, making it compatible with the user’s system of choice. In addition, this accessory can be mounted perpendicular to parallel to the optical plane for smooth panning, and the removable strap can be fed through the buckle with the excess strap exposed on the outside, or reversed with the excess following the contour of the optical housing. Features of the RRS-9000520:RRS 1.5" Standard Dovetail Manfrotto RC2 DovetailDetachable strap for open or closed bridge binocularsCompatible with 1.77"-2.56" / 45mm-65mm overall diameter (not lens size)Durable Glass Filled Nylon1/4"-20 threaded mounting socket Really Right Stuff Cinch-LR Polymer Binocular Adapter RRS-9000520