... .This design permits precision tolerance, even at high-speed operation. · Ball bearings available materials : Carbon, Chrome & Stainless Steel. Even Zirconium Oxide (Zirconia ... , rollerblades, fishing reels, slotcars, atv, quad skate, dental handpiece, bicycles, rc cars and trucks, model engines, yoyos, go karts, motorcycles, snowmobiles ...