AWG WIRE GAUGE Double Sided Wire Gauge for Ferrous Metal is a versatile and durable tempered hardened steel wire gauge and is used with ferrous metals. Examples of ferrous metals are cast iron, mild steel, carbon stool, and high speed steel. Ferrous metals are primarily used for their tensile strength and durability. Double Sided Wire Gauge Overall Size: - Diameter : 3-1/2" - Thickness: 3/32" SAE Sizes: 0.007" - 0.3125 Tempered Hardened Steel with Satin Finish For Ferrous Metal