The OTC Stinger Bearing Race and Seal Driver Set, No. 4507, provides techs a convenient way to contact the upper, inner edge of the bearing so that force can be evenly and quickly applied, ensuring quick and easy assembly. The kit contains a driver handle plus nine popular sizes ranging from 1.555" to 3.189". The 4507 kit is designed to fit precise manufacturing diameters, thus eliminating the need to purchase specific discs to add to existing kits.