double door slide lock

The listings state the locks mount in multiple positions for flexible placement — they can be installed at the top or bottom and in "any position for ventilation," making them suitable for sliding doors and windows, including patio doors.

The descriptions specify a steel bolt mechanism — a bolt-style lock that secures the door in either the fully closed position or a ventilating (partially open) position.

The product details say the lock can secure the door in a ventilating position: the steel bolt holds the sash in place while allowing the door to remain partially open. Listings also note the lock "mounts in any position for ventilation," supporting flexible placement for this use.

The listings reference use on sliding doors and windows and explicitly mention patio doors, indicating suitability for sliding patio doors as well as sliding windows.

The product descriptions list standard sliding door/window locks and step-on (foot-operated) patio locks. One listing also highlights a steel-bolt design that secures closed or ventilating positions. Because listings vary, confirm the specific model’s compatibility with your double sliding-door configuration before buying.

The listings show mixed information — an "Aluminum finish" is mentioned alongside "Material: Diecast" and "Material: Polyester." This is inconsistent across entries; verify the exact material and finish for the specific model you’re considering (manufacturer or product page should clarify).

Descriptions indicate two common operation styles: step-on (foot-operated) patio locks and bolt-style locks (steel bolt) that secure the door in closed or ventilating positions.

Some listings state that screws are included for installation. Mounting notes specify the locks "mount in any position for ventilation" and can be installed at the top or bottom, indicating flexible mounting locations on sliding doors and windows.