Diablo, 5 Pack, 12", 10/14 TPI , Flush Cut Bi-Metal Reciprocating Saw Blade, Perma Shield Coating Protects These Blades From Heat, Gumming & Corrosion, Patented Aggressor Variable Tooth Technology Incorporates A Tooth Count Per TPI That Drastically Increases From The Shank Of The Blade To The Tip Allowing For Super Fast Cuts With Less Vibration.