Wring bucket offers no-touch wringing of Microfiber mops (sold separately). “Washboard surface” effectively removes dirt & debris from mop pads before wringing. Twist-valve on bucket floor empties contents without lifting. Smooth, nonporous surface helps prevent bacterial growth & cleans up easily. Mobile bucket fits onto the Rubbermaid 6173 Janitor Cart & accommodates mop pads up to 18" in length.