Superior Automotive RideEffex Adjustable Coil Spring Lowering-Leveling Clamp (18-1220A) (1) Hardened steel clamp for strength and durability. Most economical way to lower or level most any vehicle. 4 pack to do the front or rear. Each coil uses 2 clamps positioned opposite of one another. Installs quickly and easily with basic hand tools. Fits most coil springs up to .750 (3/4) inch in diameter.