DEWALT DW4810-2 4-Inch 18 TPI Straight Back Bi-Metal Reciprocating Saw Blade (2-Pack) The product is 4" 18TPI Reciprocal Blade Easy to use The product is manufactured in China Patented tooth design utilizes sharper tooth geometry for faster cut rates Aggressive shank angle increases tooth contact, maintaining cutting speed as blade wears for longer blade life Specially formulated anti-stick coating minimizes friction and gum-up for smoother cuts 3 degree shank angle for fast efficient cutting One year warranty, one year service contract, 30 day no-risk trial