The Gordo riser's through-bolt base design allows builders and customizers a wide range of fitment options, including but not limited to H-D Springer forks and most aftermarket forks. Gordo risers are investment-cast chromoly steel with hand polished surface detailing and a mirror chrome or matte black electroplated finish and come complete with 5/16-18 UNF stainless steel Allen cap screws on the bar clamps. Designed for use with 1" diameter handlebars. Risers are drilled to take 1/2" allen head bolts from the inside. Mounting hardware sold separately.