Suitable for thin sheet metal, steel ropes, thin-walled profiles, tubes made of stainless steel and nonferrous metals, and composite materials. True .040" thick cutting wheel for fastest cutting action. Extreme hardness (V) for longest life. No burring, no blue thermal discoloration. Precision cutting accurate to the millimeter. 4-1/2" x .040", 7/8" arbor, 13,280 maximum rpm (revolutions per minute).