This ADM 7" Vixen-style universal dovetail bar includes two 100mm guidescope/finderscope rings.  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.