Bosch RAP7PK 7-Piece Reciprocating Saw Blade Set Wood reciprocating saw blades  incorporate high-quality materials and optimized 6 TPI tooth design for professional blades that cut faster and last longer Metal Reciprocating Saw Blades  incorporate bi-metal construction, reinforced pair-setting teeth and thin-kerf .035 In. bodies for pro-quality high-performance Reciprocating saw blades designed for wood with nails  incorporate bi-metal construction, reinforced 5/8 variable-pitch teeth for fast cutting and taper backs and plunge tips for easy starts Demolition reciprocating saw blades  combine bi-metal construction, reinforced 10/14 variable-tooth pitch for fast cutting Bi-metal material  delivers a hardened cutting edge for outstanding blade durability