Single Cylinder Deadbolt
Deadbolt thrown or retracted by key from the outside or by inside turn unit. Bolt deadlocks when fully thrown. |
Double Cylinder Deadbolt
Deadbolt thrown or retracted by key either side. Bolt deadlocks when fully thrown.
Caution: Double cylinder locks on residences and any door in any structure that is used for egress are a life safety hazard in times of emergency and their use is not recommended. Installation should be in accordance with existing codes only. |