Buckle Clip Base Mount and J-Hook Buckle: Allow you to attach your for camera to a Chest Harness, Adhesive Mount or Helmet Mount; Easy operation, easy to install and remove J-Hook Design for Additional Filming Angles: Its J-Hook design means the camera is further away from its mounting point, therefore allowing additional angles to be achieved when filming Compatibility: Suitable for Hero Session/5 Hero 3 3+ 4 5 SJ4000 5000 6000 Sports DV and More Screw Length: About 2.1 inches/5.3 centimeters Material: ABS+ aluminum alloy colour:black Package Contents : 8 * Camera Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.