Lenox 20578818R 8" 18TPI METALWOLF™ WAVE EDGE™ Reciprocating Saw Blades 5 Pack - Keep productivity high and downtime on the jobsite low with the LENOX® METALWOLF™ WAVE EDGE™ Bi-Metal Reciprocating Saw Blade. Intended for repetitive, everyday use with metals, these saw blades deliver up to 50% longer life (vs. prior LENOX® generation) thanks to WAVE EDGE™ technology which is designed to improve longevity. The high-speed edge helps you get the most out of your reciprocating saw while the steel backing assists in reducing breakage when cutting metal.