Cognito's Torsion Bar Keys align the truck's front with the rear. Their robust, forged steel construction ensures durability, and they install easily with bolts. These keys adjust the front ride height, commonly used in leveling kits, requiring proper height setting for optimal suspension travel. GM trucks have varying torsion bar spring rates, with some higher rates not needing aftermarket keys. This kit suits leveling and lifted applications, desiring the higher lift range setting. Proudly manufactured in the USA.