The Union 3G110 5 Detainer Deadlock is a high security lock with a silver powder coated steel case and a brass deadbolt with steel rollers. It offers a higher number of key differs than lever locks (25,000) and has force resistant, anti drill, anti-pick and anti-saw security features. This lock is EN1634-1 assessed for use on 60 minutes timber fire doors and can be supplied with micro-switches for use with alarm systems.