TUYU Motorcycle Bicycle Ride Shooting Aluminum Alloy Selfie Monopod for Insta360 One R X2 GoPro Hero 9 MAX Camera Accessories Q A Why the aluminium arm can not be locked by the screw? We give you an aluminium alloy wrench as gift in the package, you need to use the wrench to tighten , it is very hard to tighten it by your hand. --- NOTE: This selfie stick can work for ONE and ONE X / R Yi camera, other cameras need to install an additional aluminum adapter to mount on the monopod, please select SM01-E6. P.S. DO NOT USE PLASTIC ADAPTER, it is very easy to damage, and once the plastic bracket is damaged, it is easy to cause the camera to be lost or damaged during riding. Product material: aluminum alloy Please note if you need the 2 types installation brackets, we suggest the longer bracket, SM01-E5 or SM01-E6 Size: The bracket can be fixed in the size range of 1.5 to 4.7 cm As long as the dimensions match, irregularly shaped objects can also be fixed. Can be fixed: bicycles and motorcycles, Cars, Paragliders, sledges, skateboards, surfboards, etc. Specification Colour: Black Material: Aluminum alloy Please note When multiple options appear when you purchase a product, Please refer to the option picture. If you have any questions, please contact customer service. Please be sure to fill out the receipt information accurately. Russian buyers must fill in the full name. This is the delivery requirement. Dear customers, please read the product options at the time of purchase. If you do not understand, please contact the seller's customer service. Thank you.