P4641 - Key locking 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 P4641 - Key locking (.pdf, 67 kB) Close P5649 - Key locking closed shackleRed stripes indicate Security Grade 5 to BS EN 12320.