DEWALT DWA7664 9" 72T Alumnium Cutting 1" Arbor features extra-hard carbide which ensures that cutting edges stay sharp. Laser-cut expansion slots minimize noise and edge vibration for excellent surface finish with less burrs. The blade is laser etched and color coded by material so that user can see important information when they need to replace blade. Commonly used for aluminum cutting applications. Specifications: Diatmeter: 9", Teeth: 72, Arbor: 1".