Bosch 10-Pack Wood & Metal Cutting T-Shank Jig Saw Blade Set, designed for general purpose wood cutting and varied thicknesses of metal, ferrous and non-ferrous, and plastics. This set includes (2) 4" 10 TPI, (2) 4" 5-6 TPI, (2) 3-1/4" 12 TPI, (2) 3-5/8" 17-24 TPI & (2) 3-5/8" 11-14 TPI Jig Saw Blades. The T-shank provides maximum grip and stability, ensuring precise and efficient cutting.