●Quickly & easily inserts wheel bearing races and seals without destruction to race or axle housing. ●Set includes six discs to fit common sizes: 1.565, 1.75, 1.965,2.325,2.47 and 2.555 in. ●INSTRUCTIONS: For Races - Choose correct size driving disc, (tapered side), and position race over disc. Using a small hammer, tap into place. For Seals - Choose correct size driving disc, (straight side), and position over seal. Using a small hammer, tap into place.