An assortment of precision ball bearings from The Hillman Group. Precision ball bearings are used for high-precision applications in a variety of markets, such as machine tools and general industry. Balls are used to maintain the separation between the moving parts of the bearing. Variants included in this assortment range from 0.375" to 2.0472" in outer diameter. Full assortments of #58653 contain eight (8) refills comprised of Hillman item numbers #405285 - #405292.