TSS Retro Fit British Standard 5-Lever Mortice Deadlock | BS3621 High-Security Door Lock | 40 mm Backset Mortice Deadlock | 5-Lever Dead Lock for External Doors | with Fixings (Satin Chrome, 3 Inch)

• Check Measurements Before Ordering Ensure compatibility by comparing all measurements with your existing Mortise Lock before purchase. Full measurements in images.
• British Standard / High Security Certified to BS3621 for insurance-approved security. High-strength 5-lever mechanism with anti-drill and anti-saw protection helps resist forced entry and enhances door security.
• Retro-Fit Replacement – 40 mm Backset (for 2.5") 53mm Backset (for 3") Designed with the same dimensions as classic UK mortice deadlocks, including a 40 mm backset. Ideal for upgrading old or worn locks without altering the door.
• Supplied with Fixings & Accessories Includes 2 keys, matching faceplate, strike/keep plate, screws and escutcheons — everything required for a complete installation with no extra parts needed.
• Durable Traditional 5-Lever Mechanism Reliable lever system (not detainer) provides smooth, consistent locking performance and long-term durability for external timber doors.
• Versatile High-Security Deadlock Suitable for front doors, rear doors, and side entrances where a strong, insurance-compliant dead lock is required — perfect for homes, rental properties and commercial entrances.

Secure your home or business with the TSS Retro Fit British Standard 5-Lever Mortice Deadlock — a reliable, insurance-compliant solution engineered for strength, durability and peace of mind. Designed to meet the exacting standards of BS3621:2007, this deadlock incorporates a 5-lever mechanism complemented by anti-drill and anti-saw protection for enhanced resistance against forced entry. Installation is fuss-free: the lock is supplied complete with two keys, escutcheons, fixings and a keep/strike plate — everything you need to upgrade or replace existing hardware without additional purchases. Its classic mortice lock dimensions — including a 40 mm backset — ensure compatibility with traditional fittings, making it a perfect “drop-in” replacement for older deadlocks. Crafted with a lever mechanism rather than a detainer, the lock delivers smooth, reliable locking and long-term performance. This makes it ideal for external doors in homes, offices, or commercial premises where robust security and compliance with insurance standards are essential. Whether you’re upgrading an old lock or installing on a new door, the TSS 5-Lever Mortice Deadlock offers a no-compromise balance of practicality, security, and simplicity. Invest in a lock that’s built to protect — and built to last.