BONES (Powell) Mini Logo Bearings are Skate Rated, precision 608 bearings made to Skate One specifications. They have a removable rubber shield on one side, a removable metal shield on the other, a high speed molded ball retainer, precision ground and super-finished hardened chromium steel races and balls, and come pre-lubricated with Speed Cream™. One of the most reliable and affordable skate bearings ever made!