Ceramic Double Ball Bearing This is the world's first genuine bearing of its kind. Instead of combining two bearings, we created a mold from scratch to produce this product, eliminating unnecessary elements. We pursued the purest, highest-quality bearing, processed with world-class polishing technology, and meticulously handcrafted each one. To ensure the creation of a truly superior product, we limit the annual production volume. Please experience this world-leading technology. MC Squared MC SQUARED