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. Max. RPM 9,405, Recommended Use Metal, masonry, Wheels qty. 1, Wheel Thickness in. 1/2, Wheel Diameter in. 6 1/2 inch, Wheel Type Type 1 right angle, Arbor Size in. 5/8.