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- Aluminium glazed door or UPVC — Adams Rite, floor-spring closer, or multipoint gearbox
- Primary cylinder on master-key circuit or standalone deadlock
- Goods entrance on separate keying scheme, often padbar or hasp with insurer-grade padlock
Context Industrial estate unit where the primary access is electronically controlled and the secondary keyed door needs a basic working cylinder as a backup only. Standard barrel, key receipt issued on completion.