The Bosch 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, drywall, plastic and PVC and more. These recip blades feature precision-ground teeth designed for fast cutting, high performance and staying sharp longer. By incorporating high-quality materials, best manufacturing processes and proven tooth-design features, Bosch provides professional reciprocating saw blades that cut faster and last longer.