Lowering/Lift blocks are a safe and economical way to lower or raise the rear axle in passenger cars, 1/2 ton 2 and 4 WD trucks or any other vehicle with a 2-1/2" or 3" wide leaf spring suspension. Precision machined billet lowering blocks have a center locating pin for accurate placement and retention. Includes heavy duty u-bolts, washers and lock nuts. Made In USA.