The RAM-B-174U consists of a 1" diameter rubber ball, double socket arm, 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. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm; this with a twist of the arm knob allows you to move the mount to your optimum viewing position.