IVY Classic 35050 Swift Cut 7-1/4-Inch 128 Tooth Aluminum & Plastic Cutting Circular Saw Blade with 5/8-inch Diamond Knockout Arbor, 1/Card Steel blade designed for cutting light gauge aluminum (up to 1/8-inch), plastic and vinyl siding, Swift Cut (Registered Trademark) High carbon alloy-steel blade Precision ground teeth with no set for smooth accurate cuts Expansion slots reduce heat build-up and eliminate warping Arbor: 5/8-inch diamond knockout