UPGRADED METAL EXTENSION ROD: New Upgrade, Hollow Design, with Expansion Hole, Different length, Perfect for you to capture new extended angle of view, especially suitable for panoramic cameras for bicycle or helmet shooting.FINE PRODUCTION: The action camera extension arm is made of aerospace-grade aluminum alloy, which is light and stable. CNC processing, oxidation sandblasting the grip more comfortable when in use.STABLE AND CONVENIENT: The hollow design makes it possible to greatly reduce wind resistance during riding and improve the stability of shooting. The helmet extension rod can be extended in multiple sections to form a folded long arm, or can be used as an extension pole or as a self-stick.1/4" EXPANSION HOLE: The Metal Pole Mount Helmet Stick with standard 1/4 " expansion hole, both ends of the extension arm have double-leaf clamping slots and three-leaf clamping slots, can be transferred to a variety of equipment.PERFECT FOR OUTDOOR ACTIVITY ENTHUSUASTS: It is widely applicable to skiing, skateboarding, cycling, motorcycle, skydiving, etc. It is the best companion for outdoor activity enthusiasts. Extension Arm Mount Compatible with GoPro Hero 6/7/8/9, GoPro max, Insta360, One R X and so on.Specification:Item: Helmet Extension ArmColour: BlackMaterial: Aluminum alloyColor: Black/Blue/Red/Titanium optionalWeight: about 35/25/17gProduct length: 220mm(8.66 inch)/160mm(6.3 inch)/100mm(3.94 inch)Compatible models: For insta360 One R X, for GoPro Max, for Gopro Hero 10 9 8 7 6 5 4 3+ Session, for DJI Osmo Action and other similar sports Camera. Features:The new curved design is more comfortable to hold, and it can greatly reduce wind resistance when riding and improve shooting stability.It can also be used as a selfie stick when riding with an extension arm to meet shooting needs.Multiple sections can be combined to form a folded long arm.Super Light weighter, Hollow design.Standard 1/4" Screw holes expansion position, can be installed expansion accessories Quantity:Hollow extension arm x1