Steel-cutting 7 1/4in. dia., 40 tooth circular saw blade for cutting angle iron, steel plate, channel iron, I-beams, pipe and other ferrous metal shapes and parts up to 1/4in. Max. RPM 5800. Arbor 5/8 in.Blade Use Steel Cutting Blade Diameter (in.) 7 1/4 Arbor Size (in.) 5/8 TPI (Teeth per Inch) 40 Tip Type Titanium Carbide Blade Speed (RPM) 5,800 Blades (qty.) 1