Made to fit direcly on all 1 handlebars this is the cleanest solution you can find on the market. Ideal for discreet operation of starting, horn, turn signals and hi/low beam (with relay), while keeping your custom bike looking clean, shiny, smooth and uncluttered. Installation is very easy: drill the handlebars with a 9/32 drill bit (.2813 decimal inches), then use an M8x1.0 tap. If you have troubles finding a metric tap, you can use a 5/16-24 tap, which is the closest to the metric one. Made out of polished stainless steel for great look and durability. Sold individually.