ONE BLADE -- Lenox MetalMax is recommended for multiple types of metal including steel, sheet metal, stainless steel, rebar, cast iron, aluminum and non-ferrous metals. Lenox MetalMax is designed for use in the same power tools as bonded abrasive wheels, at the same RPMs and feed forces. No changes in operating settings are required. Use Lenox MetalMax as you would a bonded abrasive wheel. When cutting aluminum, it is recommended to use Lenox Lube Tube (68020LNX) or some form of saw lubricant to avoid chip welding. Delivers 1,000 or more cuts without changing the wheelAdvanced diamond technology provides 30X longer life than thin bonded cutoff wheels in metal cutting applications*Average performance in 1 carbon steel square tube vs. thin bonded abrasive cutoff wheels.Solid steel wheel body greatly reduces risk of breakage for added safety, increased productivity, reduced downtime, and a lower cost per cut compared to thin bonded cutoff wheelsMaintains original wheel diameter throughout the life of the blade for better control, reach, and precisionDoes not wear down like bonded abrasives reducing dust particles for a cleaner work station