The SKIL 21 Pc. All-Purpose T-Shank Jig Saw Blade Set features an assortment of blades for cutting a variety of materials from wood to metal with finishes to fit the application at hand. The assortment includes low-TPI blades optimized for fast cutting applications as well as high-TPI blades for applications requiring clean cuts. The blades are compatible with all SKIL Jig Saws as well as saws with T-shank compatibility. The set includes (3) 3-inch 21 TPI bi-metal blades for cutting thin metal, (3) 4-1/2-inch 10 TPI bi-metal blades for cutting thick metal, (3) 3 ¼-inch 12 TPI high-carbon steel blades for clean curve cutting in wood and plastic, (3) 4-inch 10 TPI high-carbon steel blades for clean cutting in softwood and plastic, (3) 4-inch 8 TPI high-carbon steel blades for fast cutting in softwood and plastic, (3) 4-inch 6 TPI high-carbon steel blades for fast cutting in hardwood, and (3) 4 ½-inch 8 TPI high-carbon steel blades for fast cutting in softwood and plastic.