BikeMaster Bearing Removal Kit A bearing must be removed at 90&#176; to its fitted surface, and removed evenly all the way around. So, to avoid damage, or loading the bearing too much on one side, use this bearing removal kit. Comes with collets in the most popular sizes 8, 10, 12, 15, 17, 20, 25, 30 mm. Complete with slide hammer, and comes in a durable plastic storage and carrying case. Manufacturer's lifetime warranty.