The present invention relates to a locking system (1) for locking of compartments or boxes including containers to which the access mainly consists of double doors or gates A, B, where the locking system (1) comprises a bar (2), which at one end is fitted with a primarily cylindrical shaft (3) around which the bar (2) can be rotated horizontally and which at the opposite end is fitted with an angled lock cover (12). The locking system (1) further comprises a fitting (4) that can be fitted in gate A, and which can partially enclose the cylindrical shaft (3). The locking system further comprises a fitting (11) that can be fitted in the second gate B, and which covers a lock (22) on four sides and onto which the lock cover (12) can be locked. By using this invention, e.g. containers can be locked effectively and safely, without any risk to the operator.