The Adaptable Flat Mop Wringer Insert Fits Seamlessly Into Wavebrake Side-Press Wringer For Optimal Wringing Of Rubbermaid Commercial Adaptable Flat Mop Pads. Using The Wringer Insert Enhances The Operation Of The Side-Press Wringing, Squeezing Out More Liquid. It Is Easy To Use. Simply Slip Into Wavebrake Side-Press Wringer Before Wringing Out Adaptable Flat Mop Pads.