AFTER the inner and outer bearings burned out and the hub went bad, I used this tool to pack my RV's wheel bearings. Time, fat and problems saved. Too bad I didn't do this work BEFORE there were problems on the trip. If you haven't checked your bearings lately, you should. Buy this tool, grab the red high-temp grease, take out the bearings, clean them, put them back in the bag, and off you go.