The T-handle locking mechanism is a common type of locking mechanism used on shipping containers. It is designed to secure the doors of the container closed and keep out water and wind.   Locate the T-handle locking mechanisms on the doors of the container. These are typically located near the top and bottom of the doors, and may be located on the outside or inside of the doors. Inspect the T-handles for any damage or rust. Make sure the mechanism is in good working order, and the T-handle is not loose or difficult to turn. To open the container, turn the T-handles counterclockwise. This will release the locking mechanism and allow the doors to be opened. To close the container, first ensure that the interior is clear of any obstruction, then push the doors shut. Once the doors are closed, turn the T-handles clockwise to engage the locking mechanism. Make sure that the T-handles are securely locked by pulling on the doors. Check that the locking mechanism is properly engaged by trying to open the door. It should be difficult to open if the T-handle is properly engaged.