Diablo 6-1/2"x4 Hardieblade Is The Only Approved PCD (Polycrystalline Diamond) Tipped Fiber Cement Blade Recommended By James Hardie Building Products. Diablo's Co-Branded Diablo Blade Generates Up To 50% Less Respirable Dust, While Delivering The Longest Life In All Fiber Cement Materials. The PCD Triple Chip Design Offers Up To 60-Times Longer Cutting Life Than Standard Carbide Blades. The Laser Cut Thin Kerf Design Gives Fast And Precise Cuts With Less Dust And Waste. The Anti-Vibration Design Stabilizes The Blade And Reduces Noise While Cutting And Non-Stick Perma-Shield Coating To Reduce Heat.