Park tool handlebar holder hbh2as a manufacturer of bicycle specific tools since 1963 you can safely rely on park tools many years of experience the worlds largest bike tool manufacturer is the first choice of professional and home bicycle mechanics around the world featuresthe handlebar holder is designed to prevent the handlebars and front wheel from rotating when a bike is mounted in a park tool repair standupdated to fit handlebars up to 32mm and oversized top tubes up to 50mm the hbh 2