The MILWAUKEE TORCH with NITRUS CARBIDE blade is the fastest cutting and longest life blade in cast iron and thick metals. Milwaukee NITRUS CARBIDE technology dissipates heat better and delivers 5X the life of existing carbide teeth reciprocating saw blades, greatly improving user productivity when cutting through cast iron. This blade features a new 8TPI design, allowing for the fastest, smoothest cuts in all thick metals. With larger gullets than competitive carbide blades, the TORCH with NITRUS CARBIDE will provide easier chip ejection and resist gumming up the teeth when cutting the thickest metals. Available in 6 9 and 12 blade lengths in 1PKs, 3PKs, and 5PKs. This blade has the best performance in all metals 3/16 thick and greater