Lenox 1882913 Wood/Metal 5pc Reciprocating Saw Blade General Purpose Kit Longer Blade Life and Versatility. Patented tooth design delivers longer blade life Reciprocating Saw blades allow for faster cutting in a wide variety of cutting appliations Efficient Cutting. Reciprocating Saw Blades are optimized for specific applications. Durable Construction. Shatter resistant, Bi-metal design provides flexibility and durability single-metal saw blades cannot.