Lenox, Lazer, 4", 8TPI, Carbide Tipped Reciprocating Saw Blade, For The Highest Performance In Cast Iron & Stainless Steel, Up To 10x Longer Life Than Bi-Metal Reciprocating Blades, High Performance Carbides Are Welded To Increase Durability & Prevent Tooth Loss, Straight Cuts In Large Diameter Materials, Tall Blade Profile Delivers Straight Cuts & Long Life In Demanding Metal Cutting Applications, Each Tooth Is Precision Ground To Quickly Cut Through Difficult Metals.