Cast steel Springer fork top plates with holes on a 3" (76.2mm) center-to-center distance to fit common handlebar risers with 1/2" UNC or UNF socket head screws, also known as Allen heads. Fits Inline Springer forks as on 1929-1952 W, 1929-1957 G, 1936-1940 EL, 1938-1945 UL and 1941-1945 FL models.