Ezarc Reciprocating Saw Blade Bi-Metal Cobalt Sabre Saw Blades For Metal, 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. ?Metal Master? Hard cobalt edge provide effortless cutting into sheet metal, metal pipe and profile. ?Cutting Capacity? Blades cut through medium to thick sheet metals 3-8 mm, solid pipes/profiles diameter 175mm. ?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.