The wheels are made of premium material. Rolling on the floor is smooth and quiet. They won't make any squeaky sound or damage the floor. Not Recommended for Sensitive Floors. Heavy Duty Bearings and Stainless steel structure makes each caster wheel extremely hard wearing. Spherical casters are applicable for multiple use due to its smooth and quiet feature. These antique brass casters are mainly apply on furniture, like wooden cabinet, sofa, table, bookshelf and so on.