Use your potter's wheel for throwing, trimming and, now, post-firing to smooth off pot bottoms of unwanted glaze drips, burs and pluck blemishes. This full-size, 240 grit grinding disc has a fine grit abrasive optimized for fine finishing fired ceramic ware. Standard bat holes are centered 10" apart and fit most wheels including Shimpo, Pacifica, Brent, Frema and others.