This handlebar mount uses a machined clamp designed to clamp onto round handlebars without damaging the bar. They require only 1/2" of bar space and has a 2.5" shaft. It allows for a wide range of movement and mounting angles. The standard 2.25" X 3" top plate has three mounting holes to allow left, right or center mounting options. It also has 1/4" hole for a thumb screw. Chrome finish only.