If you need a replacement D shaped DAD lock for your mailbox, then Post Boxes UK can help. Simply send an email to [email protected], 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 a replacement DAD lock, complete with two keys, to you same day (for orders before 2pm). 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.