Best Mortise Locks for Security Door of 2025

Corey Phillips Avatar
Corey Phillips
Last Updated: 31 Jan 2025

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Mortise locks are an essential component in securing a door, providing an added layer of protection against intruders. These locks are designed to fit into a mortise, or pocket, within the door and require a key to operate. They are available in a variety of styles and finishes to suit different door types and decor. Mortise locks are recommended by security advisers for their durability and resistance to forced entry. They provide peace of mind and are an effective way to safeguard your home or business.

At a Glance: Our Top Picks

XFORT® 3 Lever Brass Mortice Sashlock Cover #TOP 1
XFORT® 3 Lever Brass Mortice Sashlock
ftb score rating icon 9.8
Yale 5 Lever Mortice Deadlock for External Doors Cover #TOP 2
Yale 5 Lever Mortice Deadlock for External Doors
ftb score rating icon 9.7
TSS High Security Mortice Sashlock with Keys Cover #TOP 3
TSS High Security Mortice Sashlock with Keys
ftb score rating icon 9.5

Top 10 Mortise Locks for Security Door

XFORT® 3 Lever Brass Mortice Sashlock

XFORT 3 Lever Mortice Sashlock 65mm
Brass
65mm
XFORT® 3 Lever Brass Mortice Sashlock Cover
XFORT® 3 Lever Polished Brass Mortice Sashlock 65mm, Door Lock with Key for Internal and External Doors, Door Latch Mechanism and Key Locking Door Security, CE Approved and Fire Rated Protection.

The XFORT® Brass Mortice Lock provides enhanced security with its solid brass latch and deadbolt, making it a reliable choice for safeguarding your home. It has been rigorously tested and is CE approved, ensuring it meets high safety standards, including fire rate testing. The unique ROTALATCH technology offers a patented latch bolt reverse system for added convenience. Additionally, this lock is designed for a wide application, fitting both left and right-handed doors, which makes it versatile for any internal wooden door.

What We Like
Enhanced security features
CE approved for safety
Unique latch technology
Versatile for all doors
Elegant polished finish

Yale 5 Lever Mortice Deadlock for External Doors

655620105025
Brass Finish
2.5 Inch/64 mm
Yale 5 Lever Mortice Deadlock for External Doors Cover
Yale British Standard 5 Lever Mortice Deadlock, High Security, Visi Pack, Suitable for External Doors, Brass Finish, 2.5 Inch/64 mm

The Yale Mortice Deadlock is an ideal choice for securing your external wooden doors. It meets the British Standard BS 3621:2007, ensuring maximum security for your home. This lock is also Secured by Design approved, giving you peace of mind. Additionally, it is recommended by insurance companies and the police, which can help you meet insurance requirements. With a stylish brass finish and a convenient 2.5 Inch/64mm backset, this deadlock not only enhances security but also complements your door's appearance.

What We Like
High security approval
Insurance company recommended
Suitable for external doors
Stylish brass finish
Two keys supplied
#TOP 3

TSS High Security Mortice Sashlock with Keys

TSS
TSSBSMSL25C
Chrome
TSS High Security Mortice Sashlock with Keys Cover
TSS High Security 5 Lever British Standard Mortice Sashlock with 3 Keys and Fixings, 2.5" (68mm) Polished Chrome, Insurance Approved for External Doors, British Standard BS3621:2007

The TSS Mortice Sashlock offers robust security for external doors, being insurance approved and compliant with British Standard BS3621:2007. It comes with three keys and easy-to-follow fitting instructions, ensuring you can securely install it with minimal hassle. The lock features high-security anti-drill hardened steel plates, which protect against tampering and forced entry. Additionally, the inclusion of anti-saw rollers in the deadbolt enhances your safety by preventing saw attacks, giving you peace of mind in your home security.

What We Like
Insurance approved for external doors
High-security anti-drill plates
Preventative anti-saw rollers
Includes 3 keys and fixings
Easy to replace existing locks
#TOP 4

TSS High Security 5 Lever Mortice Sashlock

TSS
TSSBSMSL3C
Polished Chrome
57mm Backset
TSS High Security 5 Lever Mortice Sashlock Cover
TSS High Security 5 Lever British Standard Mortice Sashlock with 3 Keys and Fixings, 3" (81mm) Polished Chrome, Insurance Approved for External Doors, British Standard BS3621:2007

The TSS Mortice Sashlock offers high security for external doors, providing you with peace of mind. It includes three keys and fitting instructions for easy installation. This lock meets the British Standard BS3621:2007, ensuring it is insurance approved. Additionally, it features hardened steel plates that help protect against drilling attacks, while anti-saw rollers in the deadbolt offer further defence against sawing threats. With its design compatible with most external door locks, it’s a convenient choice for enhancing your home security.

What We Like
Insurance approved for external doors
High security against drilling
Anti-saw rollers for extra defence
Easy installation with included instructions
Compatible with most external locks
#TOP 5

TSS High Security Mortice Deadlock with Keys

TSS
TSSBSMDL25B
Polished Chrome
2.5"
TSS High Security Mortice Deadlock with Keys Cover
TSS High Security 5 Lever British Standard Mortice Deadlock with 3 Keys and Fixings, 2.5" (68mm) Polished Chrome, Insurance Approved for External Doors, British Standard BS3621:2007

The TSS Mortice Deadlock offers robust security for your external doors. Supplied with three keys and detailed fitting instructions, it ensures easy installation. This lock is insurance approved and meets the British Standard BS3621:2007, giving you peace of mind. With high-security anti-drill hardened steel plates, it protects against unauthorised access, while the anti-saw rollers in the deadbolt add an extra layer of defence against saw attacks, enhancing your home's safety.

What We Like
Insurance approved for security
Easy to install with included keys
Resistant to drilling and sawing
Compatible with various door types
#TOP 6

TSS High Security 5 Lever Mortice Deadlock

TSS
TSSBSMDL25B
Polished Brass
TSS High Security 5 Lever Mortice Deadlock Cover
TSS High Security 5 Lever British Standard Mortice Deadlock with 3 Keys and Fixings, 2.5" (68mm) Polished Brass, Insurance Approved for External Doors, British Standard BS3621:2007

The TSS Mortice Deadlock is designed for external doors, offering a high level of security with its 5 lever mechanism. You will receive three keys, along with fixings and fitting instructions for easy installation. This lock is insurance approved and meets British Standard BS3621:2007, ensuring peace of mind. Additionally, it features hardened steel plates that protect against drilling, as well as anti-saw rollers in the deadbolt, making it a robust choice to safeguard your property against common attack methods.

What We Like
Insurance approved for external doors
High security against drilling
Easy installation with included keys
Meets British Standard requirements

XFORT 76mm 5 Lever High Security Sash Lock

Xcel
f9e0c21f-72a2-4864-8b6a-7339b256c157
Satin Chrome
76mm
XFORT 76mm 5 Lever High Security Sash Lock Cover
XFORT 76mm 5 Lever Sash Lock Satin Chrome, Door Lock, High Security Mortice Door Locks with Keys, Front Door Lock with Fully Enclosed Keep, Mortice Lock Internal Or External with Rotating Latch.

The XFORT 5 Lever Sash Lock offers exceptional security for both internal and external doors. Its lightly sprung mechanism allows you to lock and unlock your doors effortlessly, ensuring convenience in daily use. With a robust 5 lever lock system and a fully enclosed keep, this lock effectively prevents burglar manipulation, giving you peace of mind. Additionally, the reversible latch means you can easily install it on either left or right-handed doors, making it a versatile choice for any home.

What We Like
High security features
Effortless locking mechanism
Reversible for easy installation
Suitable for various doors
#TOP 8

TSS High Security Mortice Deadlock with Keys

TSS
TSSBSMDL25B
Satin Chrome
TSS High Security Mortice Deadlock with Keys Cover
TSS High Security 5 Lever British Standard Mortice Deadlock with 3 Keys and Fixings, 2.5" (68mm) Satin Chrome, Insurance Approved for External Doors, British Standard BS3621:2007

The TSS Mortice Deadlock is a reliable choice for securing your external doors. Supplied with three keys and all necessary fixings, it ensures easy installation. This deadlock is insurance approved, meeting the stringent British Standard BS3621:2007, giving you peace of mind in terms of safety. Its high-security anti-drill hardened steel plates offer added protection against forced entry, while the anti-saw rollers in the deadbolt prevent tampering through sawing. This lock provides robust security for your home.

What We Like
Insurance approved for safety
High-security anti-drill design
Anti-saw rollers for added protection
Easy installation with included fixings
Compatible with various door locks
#TOP 9

Ruveno Mortice Lock for Doors

Ruveno Mortice Lock for Doors Cover
Standard Mortice, Door Latch for Internal and External Doors Mortise Lock for Door Security and Privacy

The Ruveno Mortice Lock is designed with a robust build that has undergone high rate testing, ensuring durability and security for your doors. Its unique patented latch bolt reverse system provides added convenience, allowing for smooth operation. This mortice lock is compatible with both internal and external doors, offering versatility for your home or office. Additionally, it caters to both left and right-handed doors, making it suitable for a wide range of users.

What We Like
Robust design for durability
Unique latch bolt system
Compatible with all door types
Suitable for left and right handed
#TOP 10

DIDA® 3 Lever Polished Brass Mortice Lock

3 Lever Sashlock 75mm PB
Polished Brass
DIDA® 3 Lever Polished Brass Mortice Lock Cover
DIDA® Mortice Sashlock 3 Lever Polished Brass Mortise Locks Sashlocks 75mm, Door Lock with Key Suitable for Internal or External Doors, Door Latch Hardware and Key Locking Door Security

The DIDA® Mortice Lock offers enhanced security for your internal and external doors. Made from solid brass, the robust latch and deadbolt feature advanced rotalatch technology, ensuring peace of mind for you and your family. This lock is designed for versatility, fitting both left and right-handed doors and suitable for various private rooms. Installation is straightforward, as the lock comes complete with all necessary parts and three keys, allowing you to share access with guests or family members easily.

What We Like
High security with solid brass
Compatible with various door types
Easy to install
Elegant polished brass finish
Includes three keys
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Is a mortise lock more secure?

Mortise locks are one of the most secure forms of residential hardware available today. What makes mortise locks so much more secure than their cylinder counterparts? A pocket cut into the short edge of the door, allows a longer and thicker mortise box to slide into the door itself, providing superior protection.

2. Do mortise locks weaken the door?

Mortise lock cutouts may weaken the structure of the door– yet mortise locks are mysteriously stronger than bored cylindrical locks! They give more leverage and last longer than cylindrical locks, and their versatility allows more architectural conformity to existing security hardware.

3. Are mortise locks good?

Mortise locks are reliable and strong, thus offering good door security. The classical appearance makes them more attractive than cylinder locks. They're versatile, so you can use them with all kinds of door furniture and cylinders.

Editor's Notes

During our mortise lock for security door research, we found 116 mortise lock for security door products and shortlisted 10 quality products. We collected and analyzed 13,122 customer reviews through our big data system to write the mortise locks for security door list. We found that most customers choose mortise locks for security door with an average price of £16.88.

The mortise locks for security door are available for purchase. We have researched hundreds of brands and picked the top brands of mortise locks for security door, including XFORT, Yale, TSS, Xcel, Ruveno. The seller of top 1 product has received honest feedback from 2,145 consumers with an average rating of 4.9.

Written by
Corey Phillips Avatar

Corey Philips is an electrician and lighting expert. He graduated from the University of Birmingham in 2012 with a Bachelor's degree in electrical and electronics engineering. Corey is a specialist contractor in lights. He sells and installs and recommends lights and lamp sheds, and other lights accessories. Aside from that, Corey is vast in installing and maintaining electrical appliances like air conditioners, water heaters, and the likes.