It works like a brush with the convenience of a pad. Ideal for uneven floor surfaces and recessed grout. Cleans with water or neutral cleaner. Composed of a heavy duty artificial turf surface that is sewn, with high tensile thread, onto a porous, non-woven backing pad. Will not damage baseboards or walls. Use with an auto scrubber for unobstructed flow of water of cleaning solution. Comes in different sizes, we typically stock 20"; other sizes can be ordered. 8", 13", 14", 17", 20" and 4.5" x 10" pad. All sizes packed 4/case