Mk Morse RBKITHD01 Reciprocating Saw Blade, Set 12 PieceM K Morse bimetal reciprocating saw blades are designed for the longest blade life possible. These extra tough, professional quality blades are available for a wide variety of uses in wood, metal, plastics, fiberglass, plaster and other common building materials. Includes (4) 6" 18 TPI Master Colbalt metal cutting; (2) 9" 14 TPI Master Cobalt metal cutting; (2) 6" 10 TPI Real McRipper Demolition; (2) 9" 10 TPI Real McRipper Demolition; (2) 6" 14 TPI