Metal Cutting Abrasive Blade Designed for portable high speed gas or electric saws. Made of double-reinforced resinoid-bonded aluminum oxide. Cuts structural steel, pipe, rebar, angle iron, and ferrous metals. 1/8 IN thick. Bulk.No. DW8022: 12 IN, 1 IN arbor, maximum speed 6300 RPM No. DW8023: 12 IN, 20mm arbor, maximum speed 6300 RPM No. DW8020: 14 IN, 1 IN arbor, maximum speed 5400 RPM No. DW8021: 14 IN, 20mm arbor, maximum speed 5400 RPMYour are ordering Part # 9681