The Sport Binocular Adapter is precision machined and fits any tripod-adaptable binocular and tripod with a 1/4"-20 socket/thread. Its slim profile allows it to fit between the barrels of the largest high-powered binoculars, and a quick-release connector allows the binocular to be removed for handheld use without disconnecting the entire adapter. Mfg: Vortex Optics