CNC-machined from billet aluminum (not cast) lightweight, strong and fully adjustable in every direction to fit just about everyoneSuper-solid units reduce vibration and make for a clearer image in the mirrorComes with a convex mirror glass which provides exceptional rear visibilityMade in the USAEach mirror requires a Joker internal bar mount (sold separately).Each assembly is universal and works on either left or right side of handlebars.With little modification, these units can be mounted through the ends of most existing grips, by drilling or boring the grip end.