Mini Logo precision bearings are Skate Rated to Skate One specifications. They feature removable shields on both sides, high-speed molded ball retainers, and precision-ground, super-finished hardened chromium steel races and balls. For high performance out of the box, they're pre-lubricated with Speed Cream. Incredibly durable and affordable. Skate Rated = engineered for skateboarding. Low maintainence, high quality.