Swiftly saw through midweight metal with the high-durability 5 PK 8 in. 18 TPI METALWOLF .035 in. Thick WAVE EDGE Bi-Metal Reciprocating Saw Blade. This expert-tested blade is engineered specifically for powerful cutting with innovative WAVE EDGE technology designed to improve cutting life and blade endurance. Built for rapid action, the high-strength blade features a slim profile suitable for cutting a wide range of medium-thickness metals. With up to 50% longer life, it features a compacted, spring steel support to reinforce the blade while helping reduce fractures.