The sintered saw blades are longer lasting than notched rim blades. The diamond blades are secured into a metal bond that extends the full depth of the rim, diamond continuously get exposed as the edge on the blades wears away exposing new diamond. This blade has a coarse diamond grit, a thicker kerf with a stiffer core made to cut the hardest of agate for industrial cutters. Recommended for Agates, Geodes, Tile and Ceramic. Imported.