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