This system is made specifically to mount the SV70ED on any Stellarvue telescope using hinged rings. It includes one heavy duty, quick release, dovetail shoe that attaches to our rear ring using two screws that are spaced 1.5" apart. This is the easiest way to mount the SV70ED for use as a super finder. The ring is made of a wide dovetail rail and two 96 mm inside diameter, adjustable rings for the SV70ED. The dovetail rail slides into the shoe which remains on the main telescope mounting ring.