TSS Retro Fit British Standard Upright 5-Lever Mortice Deadlock – 40 mm / 53 mm Backset Upright Deadlock – BS3621 5 Lever Mortice Lock for External Timber Doors - with Fixings (Satin Chrome)

• Check Measurements Before Ordering Ensure compatibility by comparing all measurements with your existing Mortise Lock before purchase. This Mortise Lock is designed to replace Mortise Locks with a 40mm Backset —incorrect measurements will result in an improper fit. Please check line drawing in images for full measurements.
• Insurance-compliant BS3621 5-lever design — This upright mortice deadlock meets the requirements of British Standards Institution (BS3621:2007), giving you a genuine 5-lever mechanism insurance approved for external doors.
• Strong 20 mm deadbolt throw for enhanced security — The deadbolt extends 20 mm into the strike plate, ensuring positive deadlocking and added resistance to forced entry
• Anti-drill and anti-saw protection — Built with hardened steel internal plates and a robust bolt with anti-saw features to protect your entrance from drilling, sawing, or physical attacks.
• Classic upright mortice deadlock dimensions — easy retrofit replacement — Designed to match the dimensions of classic upright mortice deadlocks (compatible with many legacy locks), ensuring a straightforward swap
• Complete set supplied with keys, escutcheons & fixings — Supplied with 2 keys, escutcheon plates, fixings and strike plate — everything you need for installation on external timber doors.

Secure your home with the TSS Retro Fit British Standard 5-Lever Upright Mortice Deadlock — a durable, high-security deadlock engineered for external timber doors. Designed to meet the rigorous requirements of BS3621:2007, this lock offers peace of mind and compliance with most UK insurance standards. Featuring a genuine 5-lever design (not detainers), this lock provides significantly stronger resistance to picking, drilling and forced entry. The deadbolt projects a full 20 mm into the door frame when locked — achieving a secure, positive deadlock that will help deter intruders Installation is straightforward thanks to its classic upright case design, which matches many traditional mortice deadlocks (often from legacy or older doors). This makes the TSS deadlock ideal as a retrofit — replacing ageing locks without needing major door modifications. Each lock comes ready to install: supplied with two keys, escutcheon plates, fixings and a strike/keep plate for a complete, ready-to-fit security solution. When you prioritise home safety, insurance compliance, and robust physical security for external doors, the TSS 5-Lever Mortice Deadlock is a reliable, high-quality choice.