Includes two 100mm, 125mm or 150mm guidescope/finderscope rings on Vixen Style Dovetail Plate Adapters.  Fits popular Vixen style dovetail bars (Synta,Meade,Celestron and others).  The rings feature large 3/8" aluminum adjusting screws with large 1/4" Delrin Tips.  The large delrin tips help to protect the finish of your OTA and prevent denting.  Stainless steel and anodized aluminum throughout for maximum durability and ultra good looks.