Circular-Sawblade 7-1/4" x 4 Teeth PCD Fiber-cement

7-1/4" 4T 5/8" arbor with diamond knock-out. The only approved PCD Hardie blade. Generates 53\ less respirable dust than leading competitor. The only PCD tipped fiber cement blade featuring triple chip grind for less dust and longer life. Lasts up to 60X longer than generic fiber cement carbide blades. PermaShield permanent coating prevents gumming and corrosion. covered by Freud\'s limtied lifetime warranty.