The Milwaukee 48-40-4070 5-3/8" 30T Ferrous Metal Circular Saw Blade is a high-quality hand tool designed for cutting through ferrous metals with precision and efficiency. Manufactured by Milwaukee Tool, a trusted brand in the industry, this circular saw blade is backed by a 5-year warranty on both the material and workmanship. With a specific manufacturer part number of 48-40-4070, this blade is ideal for automotive and various other applications where accurate cutting is crucial.