Description With a double-tooth design for long life and extreme durability, DEWALT Bi-Metal Hole Saws power through 2 times the material in a single pass. A sharp tooth geometry expedites cutting, and thick, hardened backing plates helps to prevent thread stripping. A high-speed steel height makes them ideal for tough jobs.Deep cut style holes saws will cut 2x material in 1 pass.Increased high speed steel height (highest in the industry) improves hole saw durabilityDouble tooth design strengthens each tooth for longer life and improved durabilitySharper Tooth Geometry cuts material faster for faster drillingThick, hardened backing plates prevent thread stripping WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov