Bosch RESM6X2 6 In. 8/10 TPI Edge Reciprocating Saw Blades for Thick Metal, 5-Piece 6 In. 8/10 TPI Bi-Metal blade for thick metal Turbo-Teeth technology  lasts up to 3X longer than standard reciprocating saw blades Engineered for extreme cuts  delivers excellent cuts during high-performance applications Precision ground blade  starts sharp and stays sharper Swiss-made blade  constructed with premium materials for reliable performance