Fits D Series or V Series dovetail bars. Attaches directly to the TeleVue Gibralter or Panoramic mount. Allows dovetail mounted telescopes to be used with these mounts. Incorporates a split clamp design that grips the dovetail bar along the entire surface of the saddle and will not dent or scratch the dovetail bar. The dovetail clamp has a large locking knob for tool free operation, spring loaded jaws, anodized aluminum and stainless steel construction. 2.5? Long, 4? Wide, .75? Thick, Wt. 8 oz.