Hitachi HardiBlade 7 1/4" 4 Tooth PCD Fiber Cement Saw Blade With 5/8" Diamond Knockout Arbor: * Polycrystalline diamond technology blade provides durability and longer cutting life * Self-sharpening properties * Perfect for multi-plank cutting * Can cut up to 5 planks at once * Ensures over 1,000 cuts per blade * Model# 18008