Height increase 1 inch to 2 inches with an adjustable spring spacer. Simple onekey operation ensures solid placement for durable compression extension actions. Professional tool for coil spring alignment. Maintains proper coil spring alignment and is ideal for adding larger tires. Twist the nut for precise compression expansion to provide extra clearance and improve vehicle stability. Effortless vehicle control with adjustable spacer. Delivers precise handling by enabling a controllable rear end and adjustment of automobile coil springs. Applicable for spring compression and seamless shim placement on automobile and truck springs. Improved precision for suspension adjustment. Achieves precise suspension tuning by maximizing compression and controlling rear torque for vehicle performance. Applications Upgrade a truck or SUV to accommodate larger tires by adding 1–2 inches of height while keeping coil spring alignment intact, improving clearance and stability. Finetune suspension on vehicles with higher spring compression to enhance handling and rearend stability, using the nut to adjust compression expansion for added clearance. Place shims accurately on automobile and truck springs to optimize performance and achieve consistent reartorque control during suspension adjustments.