Bosch 5-Pack 5-1/4" 24 TPI T-Shank Jig Saw Blade is designed for cutting pipes, profiles, and 10 to 16 gauge sheet metal. It can also cut 1/16 to 1/8 inch thin ferrous/non-ferrous metals, less than 2-1/2 inch dia pipes, tube stock, and angle iron. The blade is made of high speed steel for maximum life and proper lubricant is recommended when cutting metal. Basic for metal blades are the economical choice for cutting sheet metal and thin metals. Ideal for smooth, straight-line cuts. T-shank design for maximum grip and stability which fits 90 % of all current jigsaw makes and models.