2 Pack, 9" 10/14 TPI, Bi-Metal, Reciprocating Saw Blade, Standard Body, Perma-Shield Coating Protects Blades From Heat, Gumming & Corrosion, Patented Aggressor Variable Tooth Technology Incorporates A Tooth Count Per " That Drastically Increases From The Shank Of The Blade To The Tip Allowing For Super Fast Cuts With Less Vibration.