Deadbolt lock

With my previous job back in Philippines  I usually run errands going to the bank.  Depositing and widrawing money.   Sometimes I exchange the dollar to Piso.  The bank employees knew me so I can go earlier to the bank or sometimes kinda late already when it was very neccessary.  Our contact person inside the bank keep their collections of the day inside the deadbolt lock.  This is the safest place to keep the money.  Only few of the worker knew the password and this is difficult to open.  Actually when the building have fire is not easy to burn all the paper money inside because it sealed properly.  So when you think you have very sensitive documents need to keep maybe deadbolt lock drawer is the best place to put them.