I bought these to use with my Vortex Diamondback HD 15x56 binoculars. It worked well right out of the box, but adding a small plastic washer to the pan screw and tripod mount fixed it works perfectly! Adding washers prevents it from coming loose, which is a common problem with tripod mounts. Most of the time I sit on high rocky poles and watch moose. I've used it once in the field since I bought it and I'm completely satisfied!