Handlebar mounts use a machined clamp designed to clamp onto round handlebars without damaging the bar. They require only 1/2" of bar space. Allows a wide range of movement and mounting angles.
Top Standard 2.25 x 3" (with three mounting holes to allow left,right and center
mounting options. has 1/4" hole for thumb screw also the 4 hole AMPS patern