DEWALT DW3741C 10-Piece T-Shank Jig Saw Blade Set w/Case T-shank Jigsaw blade set includes 3 kinds of blades: 6, 10 and 18 TPI (teeth per inch) This product is manufactured in United States This product meets customer requirement T-shank design fits all Bosch and DEWALT jig saws 6, 10, 12, 18, 32-teeth per inch blades 6TPI/10TPI blades are 4-inches long 18TPI/32TPI blades are 3-inches long Regular and Fastcut type of teeth