DEWALT DW4890 Bi-Metal Reciprocating Saw Blade Tough Case Set, 15-Piece Combination sets provide a selection of blades for common applications Tough case expands to hold 6-inch blades and is designed to fit in power tool kit box for quick blade storage Eight-percent cobalt, reinforced teeth, and flexible bode for durability and dependability Five each of 6-TPI wood blades, 14-TPI metal blades, and 18-TPI metal blades for versatility Includes rugged, plastic storage case for safe storage and transport