QSA 1" - 3" Adjustable Lift Keys + Shock Extenders. Compatible with 1999-2006 Silverado 1500 / Sierra 1500 (4WD), 2000-2006 SUV Models (Tahoe, Yukon, Avalanche, Suburban) (2WD / 4WD) See Description Below for applications (1999-2006 1500 Models) Includes: Heavy Duty Forged Torsion Keys (L+R) AND SHOCK EXTENDERS Allows for leveling (lifting) the Front of Your Vehicle Between 1" - 3" However, we dont recommend going above 2.5" High Quality Powder Coated Finish to Protect from Rust Easy Installation (See our other listings for the install tool).