These belts, in which the grinding particles are applied to a thick layer of cork, are used in Japan by leading manufacturers of knives and shears to produce their legendary hollow grinding and high-quality finishes. They are watered before sanding. The belts respond more elastically than conventional textile belts, delivering concave surfaces with considerably fewer visible ghost lines. - 50 mm x 2 m, 3 pcs. per pack. See HERE.