The dovetail clamps provide the connection to telescopes support plates and are useful to create support instruments like side-by-side plates (to support two telescopes in parallel on the same mount) or to allow the precise positioning of the guide rings (to adjust precisely the weight balance). Our dovetail clamps, unlike the common ones, offer simultaneously the attack for Vixen and Losmandy plates. In this way you will be free to install the plates you want and you do not need to change them if they will replace your telescope support plates!