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 saw blade set features teeth that are optimized for cutting efficiency. The reciprocating saw blade set 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 reciprocating blades feature precision-ground teeth designed for fast cutting, high performance and staying sharp longer. Wood cutting reciprocating saw blades incorporate high-quality materials and optimized 6 TPI tooth design to cut faster and last longer Metal-cutting saw blades feature special design with 3 tilt angle for faster cuts and an optimized 14 TPI count for the metal thickness Saw blade set is designed for wood with nails incorporate bi-metal construction, reinforced 5/8 variable-pitch teeth for fast cutting and taper backs and plunge tips for easy starts Reciprocating saw blade set's construction provides thick 0.05 In blade body for less blade flex, vibration and variable gullet depth Bi-metal material delivers a hardened cutting edge for outstanding blade durability Precision manufacturing delivers blades that feature fast cutting and high performance Tackle any project set provides a variety of blades for different materials and applications