Extra-Wide Diamond Grinding Wheel 1/8" Fits Dremel - Glass Tile Stone Hardened Steel Unique accessory for Dremel and other power rotary tools that accept 1/8"-shank bits Solid steel wheel has industrial diamond particles permanently brazed to surface during manufacture Hardest, most-durable abrasive available for glass, tile, stone - even hardened steel; 80 grit Popular 3/4" diameter but with extra-wide 3/8" surface - covers larger area with superior uniformity Essential tool for material removal, grinding, smoothing & forming; includes mandrel, 1-3/4"L, .8 oz