Safe Deposit Locks For locking of safe deposits, safes and other equipment demanding special locking security. SC210 is a single cylinder lock operated with customer's key. SC211 includes two mechanically operated cylinder, one of which is operated by the customer's key and the other by the banker's key. Both keys are required to open the lock, but the locking can be carried out with the customer's key only. ABLOY SC210 Safe Deposit LockSingle Cylinder Lock. ABLOY SC211 Safe Deposit LockTwo Cylinder Lock.