Diablo 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 5 percent 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. 7-1/4 inch x 4 tooth pcd triple chip tooth with 5/8 inch diamond twist out arbor.