Fully CNC-machined Racing styled design Made from solid 6061-T6 bar stock for maximum strength Fits 1" handlebars Riser bases are threaded 1/2"-13 for Harley-Davidson upper tree applications Lightweight bridge style top clamp Top clamp measures 1.1" x 2.4" Made in the U.S.A.. RISERS PULLBK BRDGE CHR