The Henry Squire Old English 4 Lever Padlocks have forged steel shackles, cold rolled steel cases, brass bolts, levers and keyhole covers. They will continue to work where other padlocks would seize and jam. Recommended for securing farms, park gates, sheds, garages, gates, lock ups etc. Can be used in extremely harsh environments such as sand, on the ocean floor, exposed landscapes, forests and mud.