The RAM-B-309-1 connects to your handlebar clutch/brake clamp, left or right side and holds one 1" diameter (B) size mounting ball The base fits the control clamps on your motorcycle with 40mm x 6mm stainless steel hardware, provided in the kit The holes centers of the base have a minimum width of 0.94" and a maximum of 1.58" Made of powder coated marine grade aluminum For more information on this product check out this video.