BR3009.Z001 Fast Clamp allows for attach and release to tubing diameters 1.5'' - 1.75''. Fits 1.5" or 1.75" diameter tubing Quickly mount accessories to round tubing Light weight and constructed with durable glass-filled nylon M6 threaded insert for lights and accessories 6mm through-hole for additional mounting options Easy to attach and release, NO TOOLS REQUIRED, designed for single hand application and removal.