The Bosch Wheel Balancer, No. WBE 4230, is designed to easily and quickly mount and balance tires. A high-performance mounting set, a quick mounting nut and an extended shaft are included for accurate and fast mounting. This wheel balancer provides the ability to handle light truck tires and a greater variety of wheels for a more precise balance. The machine also comes with the Bosch Wheel Service Promise to restore the machine to full operating condition within 48 hours of any repair appointment, or Bosch will extend the factory warranty.