Sturdy & DurableExtension arm kit is made of aluminum alloy, which is more durable than plastic, and the surface is treated with anti-oxidation, featuring light weight, high strength and corrosion resistance.Wide CompatibilityThe extension arm is compatible with GoPro series, Insta360 and other sports cameras, and can be used on a variety of devices such as helmets, bike mounts, motorcycle mounts, photography mounts, etc. The kit can be assembled into an extension pole, selfie stick or stabilizer, etc.Easy to UseHollow design reduces wind resistance and improves stability. The camera can be easily fixed to the connector by using the extension arm. You just need to adjust the desired length and angle, and then tighten the screws to fix it.Lightweight & PortableThe extension bracket is light weight, small and easy to carry. When you do outdoor sports, you can easily carry a set with you so that you can use it anytime.Package IncludedYou will get 4 different sizes of extension arms (8.5cm 16.5cm 20cm 25cm). The extension arms can be used alone or in various combinations according to your needs, to record wonderful moments for you from different angles. Note: The data are all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.