DEWALT 16 Piece Bi-Metal Reciprocating Saw Blade Set with Case. These reciprocating saw blades last up to 50% longer and feature patented tooth forms that deliver fast, smooth cuts in wood and metal-cutting applications. Their Bi-Metal construction is designed to extend blade life and minimizes blade breaks. Each kit contains an assortment of blades for a variety of cutting applications and a collapsible ToughCase or easy storage. Made in the USA with global materials.