Stanley Single Plane Iron 2.3/8in STA012315 All Stanley replacement plane irons are made from chrome carbon steel which has excellent edge retention characteristics and alows a razor sharp edge to be honed.All cutters are fine rotary ground to give a flat surface that is easier to sharpen.Size. 2.3/8in - 60mm.To fit 112045, 112016, 112006 Planes. STA012315