Panasonic EY9PM11D 4-3/8-Inch 40 Tooth Thin Metal Cutting Saw Blade with 20-Millimeter Arbor 4 3/8" X 20mm arbor blade for use on Panasonic EY3502EQMKW or EY3502FQMKW Designed for cutting thin metal such as light sheet metal and residential steel siding Does not create heat when cutting, will not damage the finish of steel siding