The ERA Fortress mortice deadlock, compliant with British Standard BS3621:2007, is the UK's most trusted high-security mortice lock. Featuring a laminated deadbolt with hardened steel plates, it resists drilling and hacksaw attacks. Its five-lever mechanism includes anti-pick false notching, offering 1,000 key variations for enhanced security. The bolt extends at least 20mm for reliable locking, operable via key from both sides. Available in polished brass, satin chrome, or polished chrome, it suits doors up to 54mm thick and comes with matching escutcheons and a security striking box. CE, UKCA, and Certifire tested, it meets fire door requirements without an escape function, making it ideal for secure external and internal door applications.