The GPO Optic-Fit Pro Binocular Adapter was designed by outdoor enthusiasts who demand the highest quality standard for a binocular-tripod-mounting system designed for heavy and extreme use. It consists of a unique connect system to get your binoculars on and off that is the most inventive, durable, and fastest system in the industry. Made in the USA by industry machinists, it is a two-part system designed to work with virtually all binoculars and spotting scopes. It is the only tripod adapter you will ever need to buy.