Don't know much about this. It is new, there is what appears to be a 1/4-20 hole to mount on a tripod, then I assuume the jaw opens to accept the shaft that pivots your binos. I've never used it, and though slightly tarnished, has not a scratch on it. $12.00 shipped CONUS, Thanks for looking
PS- a gentleman has informed me that this is used only on the large 80mm binocs with a center round bar bridge that runs from front to back. The holder grabs the center round bar and secures it by the above knurled thumbscrew.