Scottoiler CrampBuster Oversize This simple accessory avoids cramping and spares wrists during long-distance driving. Once placed on the throttle, you can control the gas supply easily with the handlebars. The Oversize CrampBuster is designed for thicker handles with a diameter of 37-41mm. The original CrampBuster is successfully used by thousands of motorcyclists worldwide:- Full gas control without hand cramps - Protects wrists on long stretches - Installed and dismantled in seconds, no permanent changes of the throttle grips necessary - Gas is not blocked but follows the natural hand position - Oversize CrampBuster: For heating handles and cruiser handlebar (eg Harley-Davidson)