Aluminum Thumb Screw attaches to your GoPro style interface bicycle mount, providing more adjustment and gripping leverage for your action camera or light. Features a built in 4mm hex-key fixing bolt for locked in place set up. Note: Photos of mount are for illustrative purposes only. This listing is for the thumb screw only. Mount sold separately. Features: Tightens or loosens connection between GoPro Mount and Camera or light Compatibility with Combo Mounts or Light and Camera Mounts CNC machined 6061 T-6 Aluminum Made in USA Lifetime Warranty Weight: 10g