The Ideal 36-048 is a reciprocating metal cutting replacement blade. Made of a shatterproof bi-metal design for longer life and greater value, the cutting edge is a 8 PCT cobalt edge for extreme durability. This replacement blade has been engineered to be the longest lasting metal cutting blades available. These long-life blades perform up to three times as many cuts as similar metal cutting blades. In 1916, J. Walter Becker started the Ideal Commutator Dresser Company of Chicago from his mother's kitchen. Service, he said, was part of the product. That idea has been the core IDEAL business principle for over 90 years. Today, the many loyal distributors and customers that make IDEAL successful are a testament to Becker's original philosophy.