Features: All metal structure, hard anodizing, with better corrosion resistance and wear resistance. The 90 degree panoramic rotation base allows for easy adjustment of camera orientation. A longer quick release plate with installation that conforms to ergonomic design. Double pointers on both side of the guide rail for accurate reading. The unique 4-pin detachable design is convenient for use on the desktop and can be easily stored in the internal magnetic compartment. There is a 3/8" screw hole in the center of the bottom, which can directly install a tripod and is very suitable for macro close-up photography. Specifications: Material: Metal Size: about 18x3.8x2cm/7.09x1.49x0.78inch Model name: MR-180II Macro Focusing Guide Rail Package Includes: 1Pc Macro Gimbal Guide Rail note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.