DEWALT DW3742C 14-Piece T-Shank Jig Saw Blade Set with Case 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 Wood and Metal applications