DeWALT DW4811B 6" 18tpi Straight Back Bi-Metal Reciprocating Saw Blade (25 Pack). DEWALT is a leading manufacturer of industrial power tools with more than 300 power tool and equipment products as well as 800 power tool accessories. DEWALT tools can be found wherever tools are sold, nationally and internationally. DeWALT DW4811B25 6" 18tpi Straight Back Bi-Metal Reciprocating Saw Blade (25 Pack) Features: 6" 18 TPI Straight Back Bi-Metal Reciprocating Blade (25 pack) 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 gumming. Blade Type: Straight Back Blade Length: 6 Teeth per Inch: 18