Makita Comet Rapide Concrete Cutting Blade B-15970 is a segmented version of their award-winning original Makita B-1597. With 3-dimensional diamond grid Laser Welded Segments, this blade will deliver even consistent cutting on 230 to 400mm blades. This segmented blade also has speed and cooling holes for smoother cutting while reducing energy consumption, heat build-up and prolonging blade life. It comes with a 230mm diameter with a 2.6mm segment, 10mm thickness, 22.23 mm bore, and a speed of 6,650rpm. - Makita Comet Rapide Diamond Blade Segmented 230mm B-15970Comet Segmented blades are high-grade concrete, reinforced concrete, and multi-construction material cutting blades3-Dimensional diamond grid Laser Welded Segments for even consistent cutting on 230 to 400 mm blades - Sintered Laser Welded segments on 100 to 180 mm blades - Cooling holes for smoother cutting - It has a 230mm diameter with a 2.6mm segment, 10mm thickness, 22.23 mm bore, speed of 6,650rpm, and 2.2 to 3.2 mm diamond width (depending on diameter refer to product guide)