Stanely irons for 912 amp 220 planes stanley 0 12 508 replacement irons blades are available for all stanley block and specialist planesall stanley replacement 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 sharpeng denotes suitable for old style planesto fit 112020 and 112220 planes 9 12g and 220g old stylecutte