Investment-cast one-piece steel bar clamp accepts 1-1/8'' O.D. handlebars0.120'' (3 mm) wall x 1'' O.D. 4130 chromoly uprightsCNC lathe-turned mounting bases accept 1/2-13 t.p.i. stock and aftermarket mounting hardwareMounting holes on 3.5'' centers to fit most stock and select aftermarket H-D fork treesPullback Murdock risers feature mandrel-bent uprights for two inches of rearward bar offset—perfect for reducing reach for shorter ridersTIG welded and hand polished before polishingStainless-steel 5/16-18 t.p.i. bar clamp hardware