Orion 07215 Schmidt-Cassegrain Finder Scope Base (Black) Allows you to attach an Orion finder scope bracket, reflex sight bracket, or green laser pointer bracket to Schmidt-Cassegrain telescopes (SCT) up to 11 inch aperture Designed to accept any Orion finder scope bracket, EZ Finder II and EZ Finder Deluxe reflex sight brackets, and Orion's SkyLine Deluxe Green Laser Pointer bracket Also lets you attach a second or third aiming device to your Schmidt-Cassegrain for multiple aiming options Fits factory drilled holes on Celestron, Meade, and Orion Schmidt-Cassegrain telescopes Attaches directly to Schmidt-Cassegrain Telescope (SCT) optical tube with included mounting hardware