DEWALT DW3700-5 4-Inch 6 TPI Very Fast/Rough HCS U-Shank Jig Saw Blade (5-Pack) Precision ground teeth stay sharper longer and deliver smooth, clean cuts Deeper gullets with increased free space remove more material for faster cutting Cobalt steel (Bi-Metal) maximizes blade life and durability U-shank fits DEWALT and other universal shank jig saws