Scottoiler Crampbuster - the ultimate in Cruise Control. Designed to reduce wrist strain on the throttle hand. This model will fit handlebar grips with diameters from 30mm to 35mm (Standard & Wide) and from 37mm to 41mm (Oversize). The Crampbuster can be rotated to a neutral position if you don't want to use it for a particular period of riding. This simple device is a must for commuters and tourers alike. Suitable for any bike, the Crampbuster is available in three sizes– one for standard grips, one for oversize grips and one with a wide profile.