Stanley plane irons stanley 1 12 325 all stanley replacement double plane irons are made from chrome carbon steel which has excellent edge retention characteristics and allows a razor sharp edge to be honedall cutters are fine rotary ground to give a flat surface that is easier to sharpenthey have been ground to 25 ready for honingeach iron includes the back iron and screwstype double ironsize238into fit 112045 112016 112006 112007 planes stanley 1 12 325 double plane iron 23