These Union (Ex Chubb) 3K74E 5 lever sashlocks are British Standard mortice locks with a rollerbolt latch making it non-handed and are designed for timber doors up to 50mm thick.
It’s 20mm bolt throw brass deadbolts contain hardened steel rollers for resistance against hacksawing.
These anti-pick sashlocks are also EN 1634-1 assessed for use on 60 minute fire doors.
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