Biltwell Inc. has precisely crafted a chromoly steel riser that is a top choice among high speed, modern Harley riders. The Murdock's stiffness and reliability compared to cast or CNC'ed aluminum risers is instantly evident. Combine with any O/S handlebar from the Biltwell Inc. line of Tracker bars, Murdock O/S risers create a ride that will keep you in the fast lane. One piece steel bar clamp that accepts 1-1/8" O.D. handlebars 0.120 inch (3mm) wall x 1" O.D. 4130 chromoly uprights Mounting holes on 3.5 inch centers to fit most stock and select aftermarket H-D fork trees TIG welded and hand polished before polishing Stainless steel hardware