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 T-6 bar stock for maximum strength, Special alloy gold zinc top clamp mounting bolts are included, Lightweight "dual" design top clamps give your bike a unique "cafe racer" look, 2" or 4" tall risers are tapped for 1/2"-13 bolts (sold separately), Designed for 1" diameter bars, Made in the U.S.A.