Complete Lowering Solution – Includes everything needed to achieve a 4-inch rear suspension drop on vehicles with the axle mounted above the leaf springs, Durable Aluminum Blocks – Extruded aluminum blocks measure 2-1/2 inches wide by 5 inches long for reliable strength and fitment, Premium U-Bolt Set – U-bolts sized for 3-inch axle housings and measure 10 inches long to accommodate a wide range of applications, Protective Finish Hardware – U-bolts feature a zinc-plated finish to help guard against wear and maintain a clean appearance over time, Universal Fitment for Custom Builds – Excellent for hot rods, classic cars, and custom projects where a lower stance and improved profile are desired.