Heavy Duty Bi-Metal Blades for Metal Cutting 3/32" - 5/16" Thick. LENOX METALWOLF™ WAVE EDGE™ Metal Cutting Reciprocating Saw Blades with up to 50% Longer Life* are optimized for making quick cuts through a wide range of metal types and thicknesses. Revolutionary WAVE EDGE™ tooth form design utilizes a 3-stage tooth formation to improve cutting speed and extend blade life.Designed specifically for extensive metal cutting, METALWOLF™ Blades feature a Bi-Metal blade design, a spring steel backing, and a high-speed steel cutting edge to make a strong, flexible, quick cutting and shatter resistant blade ideal for making fast clean cuts in ferrous and non-ferrous metals.