Replaces shocks and springs by holding the suspension at ride height to allow for precision setup. Made of lightweight aluminum and adjustable in 1/2″ increments. Adjusts from 13.5″ to 21″ for the 7 inch and then the 9 inch adjusts from 15.5″ to 24″. Heims and jam nuts are included. This works very well with the Hammond Motorsports setup plates.