Use in combination with the Vortex Pro Binocular Adapter to mount your binoculars to a tripod. Compatible with tripod-adaptable binoculars with a 1/4"-20 socket/thread, the Vortex Pro Binocular Adapter Stud allows you to mount your binos to the Pro Binocular Adapter (not included) for superior stability and clarity. Installing additional studs on multiple binoculars allows swapping between optics quick and easy.