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.Tightens or loosens connection between GoPro Mount and Camera or lightCompatibility with Combo Mounts or Light and Camera MountsCNC machined 6061 T-6 AluminumMade in USALifetime WarrantyWeight: 10g K-Edge Go Big Thumb Screw Camera Accessory UPC: 850934007435