THEWORKS All-Purpose Reciprocating Saw Blade Set features blades made with bi-metal and high carbon steel construction, delivering maximum life and durability in heavy use. These blades feature teeth that are optimized for cutting efficiency. The kit features a variety of blades designed for key professional applications. The blades will tackle wood, wood with nails, metal, plastic and PVC. These recipe blades feature precision-ground teeth designed for fast cutting, high performance and staying sharp longer.