Construction:1-inch O.D. x 0.120 wall seamless 4130 chromoly tubing with precision mitered and TIG welded joints. Threaded bungs on vertical uprights are CNC-machined chromoly steel with1/2-13 t.p.i. holes to accept stock H-D mounting bolts. Available with dimples for stock and select aftermarket Harley-Davidson hand controls or smooth for aftermarket levers Fitment: We increased the width of our original H-bar two inches to improve the looks and ergonomics. It now works even better on modern Sportsters and other mid-size H-Ds.