Features: High-end anode sandblasting oxidation and CNC machining, it is strong, stable and safe to use. Standard 1/4 screw hole, makes it possible to mount both the camera and selfie stick or tripod accessories to extend more functions. Comes with a screwdriver and fixing screws for easy replacement and installation. Specifications: Material: Aluminum Alloy Colour: Black Horizontal Size: Approx. 4.2x1.53 for cm/1.65x0.6 inch Screw: 1/4 Thread Hole, Magnetic Interface at the Bottom Surface Technology: Anodic Sandblasting and Oxidation-treatment Applicable Model: for Hero 10/9/8/Max Action Cameras Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece Dual Interface Base 6 Pieces Screws 1 Piece Screwdriver