Purity Pool RPC Replacement Pad for Tile Scrubber, Coarse Pad is easily replaced using a bolt and wing nut Replaceable scouring pads are two inches thick and the perfect size to get proper pressure on the exposed tile surface Pads are not damaged by pool acid, allowing the use of tile soaps containing acid to help dissolve scale and hard water stains Pad is easily replaced using a bolt and wing nut Replaceable scouring pads are two inches thick and the perfect size to get proper pressure on the exposed tile surface Pads are not damaged by pool acid, allowing the use of tile soaps containing acid to help dissolve scale and hard water stains Hole in pad conveniently holds enough tile soap to cover an average-size pool Handcrafted in the usa with pride