AMERICAN LOCK SOLID ALUMINUM PADLOCKS ARE MADE FROM AN EXCLUSIVE ALUMINUM ALLOY OFFERING STRONG PROTECTION AGAINST THE ELEMENTS THEY ARE OFFERED IN A FULL RANGE OF WIDTHS SHACKLE DIAMETERS AND LENGTHS MOST ALUMINUM PADLOCKS HAVE HARDENED BORON ALLOY STEEL SHACKLES FOR SUPERIOR CUT RESISTANCE AND ARE CHROME PLATED FOR EXTRA CORROSION RESISTANCE.