Description: 【Mount Slot Plate】: The telescope saddle clamp features a sloped edge on a side and a straight edge on the other side, making it convenient to add and install other accessories without removing the rail bar plate 【M6 M8 Countersunk Bores】: The telescope adapter base features 3 holes with a diameter of 8.4 mm/0.33 inch, M6, M8 and 1/4 screws can be used 【Premium Material】: The finderscope mount bracket is made of premium aluminum alloy material, wear resistant, sturdy and ensures a long time to use 【Stable Connection】: Professional manufacturing astronomical telescope accessories, the telescope mount bracket is tightly clamped with the knob, providing a stable connection, has a long service life 【Portable Size】: The astronomical telescope adapter base is compact and lightweight, easy to store and carry, easy to install Specification: Material: Aluminum Alloy Size Chart: 10.2 cm x 6.3 cm x 2.18 cm/4.02 inch x 2.48 inch x 0.86 inch Package Includes: 1 Telescope Saddle Clamp  Note: Please allow slightly errors due to manual measurement and different monitors.