6-1/2" 18 Tooth Marathon Carbide Blade, 5/8" Universal Arbor, Thin Kerf For Faster, Cleaner Cuts, Heat Vents Reduce Heat That Causes Build Up & Pitch, Precision Honed C3 Tungsten, Carbide Tips Hold Edge Longer, Round Shape Means Each Tooth Cuts Uniform Equal Amount Of Wood, Blade Flatness Ensures Close Tolerances, Carded.