"Norton 6 1/2in. Circular Saw Reinforced Cutoff Blade Type 1 is the most popular cutoff application for deburring, cleaning, slotting and cutting roof decking and all types of metal, including sheet metal, steel rods and angle iron. Recommended Use Metal, masonry, Max. RPM 9,405, Wheel Type Type 1 right angle, Wheels qty. 1, Wheel Thickness in. 1/8, Arbor Size in. 5/8, Wheel Diameter in. 6 1/2."