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. 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.