The scrub pads back with a layer of fleece fabric as the loop side which can attach on the hook attachment firmly while using, at the same time, they are very easy to clean and store, you can clean the scrub pad by rinsing it after using, and store them in clean and dry place for reuse and again. You can simply attach the scrub pads and backer to your drill, it gives your fantastic cleaning results. Kit include 1/4 inch metal shaft fit for any kinds of drills. Use with Buckle backing pad to quickly and easily soap scum, hard water stains, mineral deposits and other grime, fast and effective scrubbing kitchen and bathrooms, save yourself from doing all the dirty work. The red pads are abrasive enough to clean your bathroom or kitchen floor very efficiently; Brown pads is medium stiffness; If you need stronger scrubbing, try the green . All the scrub pads are reliable for cleaning any indoor and outdoor, such as tiles, tubs, glass, stone, porcelain, showers, bathtubs and sinks. colour:Red & green & gray material:Scouring pad size:Approximately 100mm in diameter Package Contents: 20 x Red matte pad 20 x green frosting pad 20 x gray matte pad 4 x 4 inch suction cup (with 1/4 inch extension rod) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.