SVBONY Universal Dovetail Base is compatible with finder scope; can be installed on telescope; Compatible for Clestron Orion Sky-watcher Vixen and so on. Ideal for custom installation of a finder scope on telescopes not already equipped with a compatible base;You can securely attach device to any telescope. CNC machining ensures smooth surface and precise cutting of rail, it fits your telescope perfect. Made of premium aluminium alloy, solid construction is wearable and durbale for years of use. Bases feature two large thumbscrew locks to secure the finder scope bracket in place; very easy to install and detach your finder scope or reflex sight;even though wearing gloves. Main advantages: Universal dovetail base for finder scope: Ideal for custom installation of a finder scope on telescopes not already equipped with a compatible base. Please note: There are no attachment screws to hold it to your optical tube assembly; it is suitable for M4 threads screws to assemble for your optical tube;and easy to use and just put it on the optical tube and tighten the screws. Is it inconvenient to carry OTA? Have a little trouble going out? SV211 handle bar is the solution to travel problems. It is suitable for close handling and protects OTA from damage. At the same time, it can also be used as a general dovetail, suitable for installing all SVBONY guide scopes and finder scopes, especially designed for SV198 guide scopes, which are perfectly matched and enriched in use. The SV211 CNC handle bar adopts M6 mounting screw holes, and the interface type is unified, making it highly adaptable. The SV211 CNC handle bar adopts M6 mounting screw holes, and the interface type is unified, making it highly adaptable. SV211 dovetail base can reduce collision and wear when taking the telescope somewhere