Diablo, Steel Demon, 3 Pack, 9", 8 TPI, Metal Carbide Reciprocating Blade, High Strength Alloys, Cast Iron & Stainless Steel, High Performance Delivers Unmatched 50 Times Longer Cutting Life Than Standard Bi-Metal Blades In Extreme Thick Metal Cutting Applications Between 3/16" To 1/2", The Increased Blade Body Height Produces Straighter Cuts With Less Vibration.