A more convenient way to get floors thoroughly clean. Pro Wring mop is reinforced with a patented micro-fiber cleaning zone that breaks up and lifts stubborn dirt easily. It takes 2/3 fewer strokes than ordinary mops take to clean the same tough dirt spot. Then the patented self-twisting wringer efficiently wrings the mop with a simple push and twist. Use refill Model No. 133495 (SKU 603627).