Replace your heavy "cast" handlebar risers with one of these high performance all-billet aluminum riser sets Fully CNC-machined racing-styled design is made from solid 6061-T6 bar stock for maximum strength Special alloy "gold zinc" mounting bolts are included Lightweight dual design top clamp gives your bike a unique "cafe" racer look Available in 2" and is designed for 1" diameter bars Top clamp measures 1.1" x 2.4"