Diablo, Steel Demon, 3 Pack, 9'', Carbide Tipped Medium Metal Reciprocating Blade, Designed Specifically For Cutting Medium Metals & High Strength Alloys, High Performance Carbide Blade Delivers An Unmatched 50 Times Longer Cutting Life Than Standard Bi-Metal Blades In Medium Metal Cutting Applications Between 3/32" To 1/4", The Blades 10 TPI Provides Cleaner/Smoother Cuts In Metal, Increased Blade Body Height Produces Straighter Cuts With Less Vibration.