The Model EF-Heavy Duty is air-powered and was designed for passenger, bus, truck, even tractor tires, and is perfect for super-singles. The tire can rotate 360 degrees for inspection, repair or buffing, and the floor mounted controls lift and spread the tire. On the spread arms slide into the outer beads. The EF-Heavy Duty can consistently handle the largest of truck tires and to add to its heavy duty signature, some aircraft tires as well.