ERA high security combination 4 Dial Padlock, ideal padlock for external use with sealed shackle to protect against weather. This ERA combination padlock is available with standard or long shackle, the shackle is made from Molybdenum hardened steel which gives protection against sawing and cutting. The 4 wheel combination allows for 10,000 possible combinations and can be easily changed when required. The Brass body of this padlock and the sealed shackle really do make this a great combination padlock for external use.