The Rubbermaid Commercial Mop Bucket is a practical, ergonomic wheeled design intended for heavy commercial and industrial use. This mop bucket with wringer on wheels press sieve provides easy, no-touch wringing. Washboard surface effectively removes dirt and debris from mop pads before wringing. Smooth, nonporous surface helps prevent bacterial growth and cleans up easily. Non-marking casters will not damage floors. Twist valve empties contents without lifting for added safety.