Well here it is, the part is made from billet heat treated steel and is profiled for weight reduction. The finish is black oxide and the bolt hole pattern is the industry standard 2.782" bolt circle using six 3/8" or 7/16" bolt holes and is .100" thick. The bolt holes are chamfered for NAS bolts and the register is to clear 2.00" register crank hubs.
Racer can choose bolt hole size from drop down menu.