7-1/4"rock carbd blade. Circular saw blade with rock carbide tipped teeth. Ideal for remodelling, framing, demolition, and roofing. Provides fast-cutting in pressure-treated lumber, plywood, OSB, particle board, and other wood composites. Rock carbide teeth reduce breakage even during contact with nails, log screws, truss plates, and shingles. Anti-stick rim resists bulid-up. Lasts up to 10 times longer than conventional carbide tooth blades. Flush ground teeth and reinforced shoulder. Vented to reduce warping. 7-1/4" diameter. 5/8" round arbor. 18T, combination/framing