This is a universal throttle assist. This adjustable chrome plated aluminum assist is designed to mount to the end of most grips with four screw style end caps like the ISO grips from Kuryakyn. It includes four longer screws and an allen wrench for installation. This allows the rider to rest the palm of the throttle hand on the rubber pad in order to relax the muscles to reduce fatigue. This helps a great deal on those long trips. The paddle area measures 2 1/2" X 1 1/4".