Our hooked-shaped bar end plug for handlebars is a useful addition for track cyclists looking to lock and tuck their hands for improved body position. Our Speed Plug Hook boasts a duel-locking mechanism with two o-rings and an expanding wedge that "bites" the inside of the bar, securing placement from any pulling forces. All of our 3d printed parts are made in our Tennessee, USA facility. Our Speed Plug Hooks are sold as a pair.