If you want your wheelchair to move faster, go farther and smoother, then you have to maintain your wheelchair’s bearings. Your wheelchair has bearings in three places: front caster, front fork, and rear wheels. Most wheelchair manufacturers say you need to re-grease or change your front caster bearings yearly, and the forks and rear bearings as needed. With the right tools, this is easy to do. This kit includes 8mm Blind Bearing Puller/Extractor and 8mm Bearing Installation Tool which allows you to remove 8mm bearings found in your wheelchair's front caster wheels.