Ezarc Reciprocating Saw Blade Bi-Metal Cobalt Sabre Saw Blades For Thin, 5-Pack ?Long-Life Teeth? Teeth made of bI-metal with 8% Cobalt which makes EZARC reciprocating saw blades with 2times longer life comparing with normal bi-metal blades without cobalt. ?Precision Metal Cutting? Bi-metal cobalt edge provide effortless cutting into sheet metal, metal pipe and profiles, set teeth design helps to reduce heat build up and maximize your cutting efficiency. ?Cutting Range? Effortless cutting into sheet metal, thin metal pipe and profile. ?Optimized Design? 0.9 thin wall and set teeth design helps to reduce heat build up and maximize your cutting efficiency. ?Universal shank? 1/2 inch shank fits all Sawzall tools on the market including Bosch, Dewalt, Milwaukee Sawzall Saw, SKIL, Makita, Black Decker, Ryobi, Porter Cable, Hitachi, Flex, Hilti, Metabo and more.