- Lightweight and rust-resistant material: Made from a lightweight aluminum alloy, this eyepiece coaxial lock adapter is designed to resist rust, making it ideal for outdoor astronomy adventures. - Stable coaxial connection: The coaxial quick-lock feature provides a secure, stable connection between your eyepiece and telescope, improving your observing experience with fewer interruptions. - Secure installation with anti-slip seal: The integrated anti-slip gasket offers a reliable fit, keeping your accessory firmly in place so you can focus on your observations. - Adjustable size options: Available in three sizes to fit different telescopes with M42/eyepiece drawtubes, meeting all your observing needs. - Practical use scenarios: - Quickly swap eyepieces during long observing sessions without losing alignment or stability. - Use in outdoor conditions where wind or movement could affect performance, thanks to a secure, non-slip fit. - Choose the appropriate size for your specific telescope model with M42 drawtubes to ensure proper fit and reliable performance.