Universal Dovetail Base for Finder Scope - Ideal for Installation of finder scope, laser pointer. Fits factory drilled holes on a SVBony and any scope with a 20mm hole offset. Please note, this is more meant to be a temporary stop gap but may hold up fine if the appropriate filaments are used and the mount isn't subjected to significant impacts. Note, the hole pattern is set to M4, and the finder/accessory locking screw threads are also M4.