Get durability and precision with these DEWALT 9" 10TPI 2X Reciprocating Saw Blades, 10 Pack (DWA4179B). The aggressive shank angel increases tooth contact, which helps maintain cutting speed as the blade wears for longer blade life. Its patented tooth design utilizes sharper tooth geometry for faster cut rates. Plus, the specially formulated anti-stick coating minimizes friction and gum-up for smoother cuts.