Best for Heavy Metal cutting, these blades have The Power Arc Curve that delivers up to twice the blade life when compared to traditional straight Lenox reciprocating saw blades. This aggressive blade design optimizes the blade's angle of attack for faster cutting in a variety of materials. In addition, Lenox's T2 Technology and precision applied Titanium Coating ensures that the teeth are more wear-resistant so that they stay sharp for quicker cuts and help dissipate heat making the blades last that much longer.