Bones Bearings Swiss Ceramics Bearings Bones Swiss Ceramics are in a class by themselves. If you want the best there is, this is it. The ceramic balls are much lighter, harder, stronger, waterproof, and longer lasting than the finest steel balls. Made in Switzerland. Accelerate faster. Roll faster and farther. Resist dirt and moisture better. Help to repair injuries to your races caused by dirt. 1 non-contact, removable rubber shields allow easy cleaning. High speed nylon ball retainer for greater strength and speed. Skate Rated clearances, tolerances, materials and lubricant provide the best performance and durability possible.