According to ISO 3318 and DIN 894. 15° is the jaw set. Gedore 31CrV3 vanadium steel. Steel-gray finishes start at 41 mm and go up to 38 mm with manganese-phosphate finishes. *Not standardized; sizes range from 10 to 135 mm with a hanging hole. Length: 239 mm (L, L1) The width of the flat is 27 mm. Head Width (b, b1, n, W3): 56.0 mm Head Height (a, a1, b,