Is Master Key reusable?

Can you use the master key more than once?

Master Keys can be used once after which they are returned to the market.

Is the master key single use?

The only uses it has after this point is in Sen's Fortress to free Big Hat Logan and obtain a Soul of a Hero. However, the player will keep the Master Key when moving into NG+, allowing them to use it in the next playthrough.

Can master key open all locks?

When lock rekeying into a master key system, two keys are created: Change key: This key can open the master lock, but only the master lock. It cannot be used inside any other locks you have. Master key: The master key can open all locks you have in your residential or commercial property.

What does the master key open?

If an apartment building has been master keyed, it allows one key to override all the locks in the system. For example, apartment 201′s key will not open 202′s lock but the master-key will open 201′s and 202′s lock and all other locks on the system.