DEWALT DW3720-5 3-Inch 14 TPI Thick Metal Cut Cobalt Steel U-Shank Jig Saw Blade (5-Pack) Metal Made in USA The product is 3" 14TPI MTL Jig Blade Easy to use The product is manufactured in China 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