Makita A-90451 7-1/4-Inch 28 Tooth PCD General Purpose Fiber Cement Cutting Saw Blade with 5/8-Inch and Diamond Knockout Arbor 7-1/4" Carbide-Tipped Saw Blade for general purpose cutting in Fiber-Cement Board Polycrystalline Diamond (PCD) Tips are designed for long lasting cuts on the job PCD Diamond Teeth cut 2.5X faster & last 30X longer Exclusive Makita Heat Vents reduce heat that causes build-up Recognized by James Hardie Building Products for use with James Hardie Siding Products