Buckle Clip Base Mount and Surface J-Hook Buckle: Allows you to attach your GoPro camera to a Chest Harness, Adhesive Mount, or Helmet Mount; Easy operation, simple to install and remove J-Hook Design for Additional Filming Angles: The J-Hook design positions the camera further from the mounting point, enabling additional filming angles Compatibility: Compatible with GoPro Hero Session, Hero 5, Hero 3, 3+, 4, 5, SJ4000, 5000, 6000, DBPOWER, AKASO, VicTsing, APEMAN, WiMiUS, Rollei, QUMOX, Lightdow, Campark, Sony Sports DV, and other similar action cameras Screw Length: Approximately 2.1 inches (5.3 cm) Material: ABS + aluminum alloy Color: Black Package Contents: 8 / 16 / 24 / 32 / 40 x Camera Accessories Note: Only the items listed above are included. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.