4 pcs Aluminum Alloy Action Camera Extension Arm Mounting Kit Helmet Mount for GoPro Series, Insta360, and Other Action Cameras. Robust and Durable: The extension arm kit is made of aluminum alloy, which is more durable than plastic. The surface is treated with anti-oxidation, offering lightweight, high strength, and corrosion resistance. Wide Compatibility: The extension arm is compatible with GoPro Series, Insta360, and other sports cameras. It can be used on various devices like helmets, bike mounts, motorcycle mounts, photo mounts, etc. The kit can be assembled into an extension pole, selfie stick, or stabilizer. Easy to Use: The hollow design reduces wind resistance and improves stability. The camera can be easily attached to the connection using the extension arm. Simply adjust the desired length and angle, then tighten the screws to secure it. Lightweight and Portable: The extension mount is lightweight, small, and easy to carry. When engaging in outdoor sports, you can easily bring a set along, allowing you to use it anytime. Package Included: You will receive 4 extension arms of different sizes (8.5 cm, 16.5 cm, 20 cm, 25 cm). The extension arms can be used individually or in various combinations according to your needs, allowing you to record wonderful moments from different angles.