This is GRAFF Master 400x15x3.0×25.4/20 mm diamond cutting blade for concrete and stone. 15 mm high segments are attached to the blade body by hot pressing, which provides durable connection for even longer service life of the blade. It is recommended to use the blade with coolant, but dry cutting is also acceptable if a maximum rotation speed does not exceed 3.800 rpm. Cutting thickness is 3.0 mm. The blade can be installed on both Stihl power cutters with 20 mm and power cutters of other manufacturers with 25.4 mm bore diameter.