The NiteRiderActionCam C2 Handlebar Mount gives you the option to mount two action cameras or various NiteRider lights using an adapter. accessories using one mount. If you're looking for options to mount various accessories, NiteRider(R) Lumina(TM), Mako(TM), or Pro series lights, look no further. Features: Fits handlebar diameters between 22mm and 31.8mm Compatible with most screw mounted action cameras