If you require a replacement Briefkasten letter box lock, then Post Boxes UK can help. Simply send an email to [email protected] or call us on 01922 218218, with the following information: Your name and delivery address We will then forward an invoice to you and upon receipt of payment we can despatch the replacement keys to you same day (for orders before 1200 noon). Alternatively, you can order online on our secure website. Availability - ex-stock. Should you require any further information, please call Post Boxes UK today on +44 (0)1922 218218. Alternatively, your enquiry can be emailed to [email protected] Thank you.