DEWALT DW3728-5 3" 32 TPI Sheet Metal Cut Cobalt Steel U-Shank Jig Saw Blade - 5 Pack N/A Made in USA Unique curved tooth design minimizes stress points for longer blade life and faster cuts Cobalt steel (Bi-Metal) maximizes blade life and durability U-shank fits DEWALT and other universal shank jig saws Unique curved tooth design minimizes stress points for longer blade life and faster cuts Cobalt steel (Bi-Metal) maximizes blade life and durability U-shank fits DEWALT and other universal shank jig saws