DEWALT DWA4179 9-Inch 10TPI 2X Reciprocating Saw Blade (5-Pack) Taller high speed steel strip reduces breakage and maximizes tooth durability and life Aggressive shank angle increases tooth contact, maintaining cutting speed as blade wears for longer blade life Patented tooth design utilizes shaper tooth geometry for faster cut rates Specially formulated anti-stick coating minimizes friction and gum-up for smoother cuts Aggressive shank angle increases tooth contact, maintaining cutting speed as blade wears for longer blade life Patented tooth design utilizes shaper tooth geometry for faster cut rates Specially formulated anti-stick coating minimizes friction and gum-up for smoother cuts Taller high speed steel strip reduces breakage and maximizes tooth durability