The RAM-B-174U consists of a 1" diameter rubber ball, hardware for mounting to both brake/clutch reservoirs and rails that are 0.5" to 1.25" in diameter. The mounting hardware for brake/clutch reservoirs include both standard and metric mounting bolts. Multiple pivot points, rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials insure your device is safe, secure, and within easy reach.