Features: Helmet-mounted adjustable arm, suitable for the curved surface of bicycles, motorcycles, bikes, and climbing helmets. Made of aviation aluminum alloy, solid and incredibly durable. Features a high-end anodic sandblasting and oxidation finish for a comfortable feel and fade resistance. Multi-angle adjustment allows you to set your desired angle. Can be tightened with an Allen wrench for a secure and stable hold. Specifications: Material: Aluminum Alloy Size: about 12x2.5cm/4.72x0.98inch Process Technology: CNC Machining Surface Treatment: Anodizing Applicable Models: for Hero 10 9 8 Max 7 6 all series, EK70004K, 360 ONE R action cameras Package Includes: 1x Three-Way Adjustment Arm 1x L-shaped Wrench