CMT 236.004.07 ITK PLUS Diamond Saw Blade for Fiber Cement Products, 7-1/4-Inch x 4 Trapezoidal Teeth with 5/8-Inch&lt;&gt;Bore, PTFE Coating For very long-lasting cuts, up to 60 times longer than carbide blades. For portable circular saws/miter saws. Cut fiber cement & plasterboard. 0.067 kerf thickness, 0.055 plate thickness, 12 hook angle, Trapezoidal Grind. SinterHip High-density carbide teeth to prevent from any material failure. Longer cutting life. Thin kerf allows for smoother cuts and more cutting speed. New standard for performance and value.