Trak-Jax ramps were inspired by an auto-crosser who didn't want to buy a new high-priced, low-profile jack just to change his tires at the track. This set of two ramps lift your car 3 inches so that you can fit a standard floor jack underneath. They're small and lightweight, so you can easily toss them in the trunk of your sports car for your day at the track. They come with a 1.5 inch stop. Trak-Jax are 100% solid, high-density foam with a rugged anti-slip coating. This patented process results in a product that is extremely lightweight, yet strong and durable. Trak-Jax will not slide, scratch, or otherwise damage any floor type.