These Panhard Bars are made up of Grade Hardware and High Strength Chrome Moly Alloy Steel. Panhard Bars are Weld-in Units that will Allow you to Adjust your Rear Roll Center with Ease and Eliminate all of the Deflection Associated with the Factory Panhard Rod. Adjusting the Roll Center will Allow you to Dial the Handling Balance of the Vehicle by Helping to Control Under and Oversteering.