Bearing Puller Set: This set includes self locking insert adaptors which allow simple removal of blind bearings. More Effective than Traditional Pullers: Removes a variety of blind bearings where traditional bearing & gear pullers fail to reach as easily. Ball End Tip Adaptors: These fit in easily to deep groove bearing races. Provides traction when turned 90? inside the bearing case for easier & quicker extraction. Time Saving Solution: This method helps when accessing the ball bearing isnt possible through the outer ring or through the bore. Ball End Adaptor Sizes Included: 5, 6, 8, 9, 11, 12.5mm.