Milwaukee Twins Straight riser sets for 1" handlebars have a unique old school look that fit most custom or stock applications Constructed from forged aluminum Risers have 1/2"-13 threads and will require the use of riser bolt kit 5000885 or equivalent Milwaukee Twins Chrome Two-Piece Riser Clamp Set 5000874 (sold separately) Will also fit applications with 3-1/2" riser centers and single piece top clamps