"This AME 2-pc. set provides the easiest, fastest way to dismount and mount tubeless truck tires. Tire can be removed and replaced in as little as 20 seconds Wheel remains on the ground through the entire process, with no need to lift the tire and wheel assembly to remove the bottom bead. Remounts tire in less than 12 seconds. U.S.A. Accessory Type Mounting/demounting tool, Dimensions L x W x H in. 10 x 10 x 55, Recommended Use Tire change accessory, Tire Height in. 17 1/2 to 24 1/2, Tire Type Universal. Works on Super Singles 315-445 Works on most radial and bias ply tires Will not damage aluminum or mag wheels"