Kolpin Outdoors ATV Handy Throttle Kolpin's ATV Handy Throttle is designed to address thumb fatigue without altering the throttle's mechanical functionality, allowing for extended ride times. Features: Eliminates thumb fatigue without changing the mechanical function of the throttle For ATVs, watercraft and snowmobiles with a standard 7/8 handlebar and a thumb throttle Fast, easy installation Made of high quality, UV resistant reinforced plastic that withstands extreme temperatures