54849 - Key locking closed shackle Application Red stripes indicate Security Grade 5 to BS EN 12320. Specification Padlock body of hardened steel, black chrome plated.Shackle of rustproofed hardened steel, 13mm diameter.Drainage holes in the padlock body prevent freezing. No external screws or rivets.Tensile strength: over 10 tons. Finish Standards Downloads 54849 - Key locking closed shackle (.pdf, 64 kB) Close 44841 - Key lockingRed stripes indicate Security Grade 5 to BS EN 12320.