Fits D Series or V Series dovetail bars. Attach the QHY PoleMaster to a D series or V Series dovetail bar. 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. as shown 12 oz.