Used for my Jeep jk. Item description: Large Tires are no challenge to change with an AEV Jack Base. This simple kit provides a safe and secure support for traditional scissor jacks that increases the size of tires that your jack can service to 37" or more. A 7.5" x10.5" base provides exceptional stability for any standard jack that makes your jack easier to use in difficult off road conditions, including rocky terrain, trails, and muddy conditions and allows it to double as a wheel chock to prevent disabled vehicles or trailers from rolling. The convenient design of the AEV Jack Base also include built-in compartments in the base that can store your AEV lug nut extension or OE wheel lock key. And just as conveniently, the AEV Jack Base is shaped perfectly to fit into any rear floor compartment.