Stanley 12-313 Iron Bench Plane Replacement All Cutters are fine rotary ground to give a flat surface that is easier to sharpen Length: 50mm Material: carbon steel Hardened, tempered high-carbon chrome steel assures excellent edge retention Can be honed to a razor-sharp edge Ground to a flat surface for easy sharpening Comes with accurate ground edge of 25; finishing with an additional honed angle of 30 is recommended Limited Lifetime Warranty