The new SpeedWave Diamond Blades by Bosch, offer an innovative new segment design. The Bosch Speedwave also offers the world’s first center vibration-dampening Cooling Disc to cut faster and last longer. The Bosch SpeedWave Diamond Blades are the best solution for cutting cured and reinforced concrete, roofing tile, brick and masonry materials. Available in 4.5, 5, 7 and 9-inch. diameters.