Description: This dovetail plate is designed for astronomers seeking to enhance their telescope setup. Made from metal, it ensures long-term use and reliability. The adapter plate features a narrow rail size of 43.4mm, facilitating quick disassembly and assembly of the main mirror tube. Its convenient design includes a locking mechanism with a screw head that can be pulled out to change the wrench direction, along with an M8 screw hole for optional counterweight installation. Compact and easy to handle, this adapter plate is perfect for converting wide rail telescopes to narrow rails, making it compatible with equatorial mounts for improved tracking accuracy. Size Chart: 20.5cmx10.2cm/8.07inchx4.02inch Package Includes: 1 Wide to narrow dovetail adapter plate Note: Please allow slightly errors due to manual measurement and different monitors.