Finderscope rings with SCT base. This quick release mounting system is made for mounting rings on the rear cell of most SCT's. The base attaches with two screws that are 1.125" - 1.55" apart. The base is low profile and places the rail between the rings only 1 1/8" above the mounting surface. The dual rings may be removed quickly and easily for transport or storage. The Rings are 3 7/8" I.D. and come with nylon tipped stainless steel adjustment screws.