1" chrome handlebar with indents mounts to 3-1/2" center to center with 1/2" x 20 bolts.

FITS: FXR 1982-1994
XL 1982-UP
FXD 1991-2017
FX 1982-1984
FL 1982-1984
FLT 1982-2007
FLST 1986-2017
FXST 1984-2017