The Berlebach Dovetail Clamp with Pressure Shoe from Vixen Optics is a universal clamp designed to accept any dovetail plate with a mounting angle of 60° to 75°.
The clamp attaches to any compatible support via four countersunk-screw mounting holes and utilizes a knob based locking mechanism to secure a dovetail plate in place. It can be used with nearly any plate which conforms to the universal dovetail standard but it is notably compatible with Vixen, Celestron, Synta, GRII, and GRIII dovetail plates. The diameter of the clamp is 3.1" and it weighs just 0.5 lb.