The Master Cobalt® Metal reciprocating blade is the best choice for cutting any machinable metal up to 1/4" in thickness (and it cuts wood too).
Morse Master Cobalt® Bi-Metal technology gives you 3 times the life of standard reciprocating saw blades. These are the longest lasting recips available. They cut more smoothly, more accurately and offer greater value. The 8% cobalt cutting edge is electron-beam welded to high strength steel backer for greater wear resistance and longer life. Master Cobalt® Reciprocating Saw Blades have conventional shanks.