Era Fortress Mortice Deadlock Brass 63mm Option:Brass 63mm The British Standard High Security The British Standard High Security Nightlatch meets the new BS 3621:2004 standard The ERA Multi Purpose Bolt can be fitted to aluminum and wooden sliding and hinged doors The long bolt throw makes it ideal for patio and garage doors Simply press the spring bolt to lock and use the key to unlock The rotating hardened steel bolt resists hacksawing When in the closed position the screws are concealed Interior Material: Zinc Alloy Fixings included (H)26 (L)82 1 year guarantee and warranty The British Standard High Security Mortice Lock meets the new BS 3621:2007 standard which meet the exacting demands of the insurance companies and the police 1000 key variations High security levels are delivered by a 20mm bolt throw on every lock All locks have hardened steel plates to resist drilling False notching in levers resist lock picking Interior & Exterior Material: Steel & Zinc Alloy Fixings included 10 year guarantee and warranty