The Eibach Lift Block system is designed to increase the lift on solid-axle trucks that use leaf spring suspension. The Lift Block system consists of a pair precision machined from 6061-T6 billet aluminum blocks, a set of U bolts to secure them to the axle, and bump stop spacers (when necessary). Available in 1" and 1.5" lift heights, Lift Blocks are the perfect complement to your PRO-TRUCK COILOVER or PRO-TRUCK-LIFT system.