Constructed of 6061 aluminum. Fit all models with 3.5in. center-to-center riser spacing. Work with any standard 1in. handlebars. Drilled for internal wiring (except 4in. risers). Base hole tapped for standard 1/2in. x 13 mounting bolts (bolts not included). Sold in pairs with top clamp and hardware. Made in the U.S.A..