Specifically designed for installing new bearings in the rear drive axle, and on the front drive axle if the vehicle is four-wheel-drive, the OTC Stinger Truck Pinion Bearing Race Driver Set, No. 4409, is ideal for shops that do powertrain service. The kit consists of eight popular bearing and seal drivers ranging from 2.687" to 4.5" that cover most applications found in trucks, vans and SUVs. The extension handle included in this kit permits the user to reach deep into the differential case and properly strike the handle to drive in the race. The knurled handles offer extra grip with oily hands for safer and faster operation. A pneumatic drive adapter is also included for use with an air hammer to effectively ease installation efforts, and can be used interchangeably with the drive handle extension.