This specialized dovetail mounting base fits factory drilled holes on most Meade, Celestron, and Orion Schmidt-Cassegrain telescopes, allowing you to add a high-quality Orion aiming device for enhanced performance under the stars. Oval-shaped mounting holes make this dovetail base compatible with a wide variety of SCT telescopes. The dovetail base accepts the bracket of all Orion finder scopes and Orion EZ Finder reflex sights. A large knurled thumbscrew makes it easy to install and detach your Orion finder scope or reflex sight, even while wearing gloves.