People ask, we provide. Looking to mount your light or other GoPro compatible device on your handlebars or tubing, here is your solution. Simply unscrew the bolt on the bottom, open and fit around your handlebar and tighten. Once tight, the cup on the top of the mount can be loosened for 360-degree rotation as well as pitch adjustability. The top of this mount is the camera standard stud to accommodate most cameras. If you are using a GoPro style camera, the adaptor spins on and you are good to go. For those wondering, this style mount is a high impact plastic style mount. Fits handlebars between the diameters of 2 - 2.5cm (.8" - 1.0").