The Celestron Binocular Tripod Adapter allows you to mount your binoculars (porro or roof) onto a tripod or other support system to eliminate fatigue and improve stability without hand-shake or other vibrations that can interfere with the viewing experience. It has a 1/4"-20 stud with an elongated thumbscrew for tool-free installation on your binocular, and a 1/4"-20 mount for the tripod.Features- 1/4"-20 Tripod Mount- 1/4"-20 Binocular Mount- No Tools Required