diamond Set of 4 flexible electro-plated diamond sponge blocks Curved diamond edges for smoother sanding of any surface Lasts 100 times longer than sandpaper Works on glass, tiles, ceramics, bricks, stone, wood, paint, fibre-glass and composites Fast, aggressive, long-lasting, consistent & cost-effective Pack of 4 diamond hand polishing pads extra coarse grit 60 (green). Professional results on every job: Wet or dry. This pro pads break edges of cut glass, tiles and ceramics; Grinds and bevels bricks, concrete, stone - even hard wood; Prepares rough surfaces fast for any paint or varnish; Rub down wall plaster and fillers in no time; Superb on fiber-glass & composites. REPLACES ALL THESE TOOLS : Sandpaper & blocks, Wet & dry paper, Grinding stones, Abrasive sponges, Tile edging tools. BRILLIANT - JOB DONE! KGS DIAMOND is the world's leading manufacturer of flexible diamond abrasives.