DEWALT DW3753-5 4-Inch 6 TPI Fast Clean Cut Wood Cobalt Steel T-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 T-shank design fits all Bosch and DEWALT jig saws 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 T-shank design fits all Bosch and DEWALT jig saws