This is a 1/4" (.250) thick Steer axle (FF) plate that can be used to check endplay on an aluminum hub. The steel plate would be bolted to the aluminum hub using the removed hub cap bolts. This bracket is Zinc plated to prevent rusting, and Please note that you will need two of these plates to install one on each side of hub to match up to the dial indicator magnets. The hub bolt pattern is for a 4-1/2" x 6 bolts.
