BlueSpot segmented gold diamond dry cutting discsSpecially designed to provide fast and accurate dry cuttingIdeal for use with many materials including roof tiles, high-density concrete, kerbstones, slabs, pipes and bricksHigh resistance to breakage and long-lasting durabilitySuitable for all makes of angle grindersDiameter: 115mm (4 1/2")Bore: 22.23mmSegment Depth: 8mmMaximum safe speed: 13000 RPM (80m/s)