| Material. zinc alloy. Key:copper ,Chain iron. |
| Plated steel chain and diecast keepers secures door while allowing viewing and ventilation |
| Can be unlocked with key from outside or inside |
| Bolt slides into keyed mechanism to lock |
| When leaving, insert chain button into slide Plate, then lock from outside by reaching through door opening and insert lock shoe into lock |
| For re-entry, open door, insert key and turn 1/4 turn lock shoe is automatically released |
| Keyed differently |
