Mortice Locks
Located and rebated inside the door for a flush finish, mortice locks offer a fantastic security level and are hard for intruders to force open. Coming in a range of multi-point options, mortice locks are also particularly difficult locks to pick. The mortice lock is ideal for those seeking a more secure lock for their home, keeping your belongings safe and secure.
Read moreOptions for Mortice Locks
As one of the most popular types of door locks come in different sizes, shapes and options for effective home security. Our range of mortice locks are perfect for any door – select from a variety of locks and find the best one suited for your home.
5 Lever Mortice Locks
Our range of 5 lever locks are the perfect security option for entry points and front doors as they have the greatest level of security. Browse our range of 5 lever mortice locks and find the perfect lock for you, within our locks options we also supply a range of insurance rated mortice locks for stronger security and peace of mind. Popular 5 level mortice locks include the Union 2134E Mortice Deadlock (BS3621:2007), a fantastic lock built to British Standards, the Legge 5 Lever Deadlock (BS3621:2007), again a highly robust mortice deadlock built to British Standards, the Banham m2002 Deadlock, the Union 2234E Sashlock, Union, 3K74E Sashlock, and the Legge 5 Lever Sashlock.
How to know if you need a 5 lever mortice lock
Five lever mortice locks are most commonly used for external doors due to the level of security offered. Identifying a 5 lever lock is simple when following these points.
The most common traits for 5 lever mortice locks are:
- Most common types of locks for wooden Doors – generally this will be a heavy, wooden or timber front door, but could be a back door, shed door or internal door. The latter is most common in shared accommodation.
- Open with a key – the security of a 5 lever mortice lock is that it is operated with a key from both sides
- Lock fitted in to door material – 5 lever mortice locks are fitted on the leading edge of the door for security, and will not be on the surface of the door
- 5 lever – locks of this kind will generally have this level stamped on the plate of the lock, found on the inside of the door
How Secure is a 5 Lever Mortice Lock?
Mortice locks with 5 levers are generally seen as one of the strongest and secure types of locks for external doors.
To increase security further, a nightlatch can be fitted to increase security further and lock the home with a second layer of ironmongery.
BS3621 5 Lever Mortice Locks
BS3621 5 lever locks have additional security within them, most notably these ALL have metal, anti-drill plates as standard. These are more secure and to obtain the British Standard kitemark have all been tested against common breaking and entry methods.
To confirm whether your current lock is a British Standard, look out for the following:
- Kitemark – The locks holds a BS kitemark on the plate
- Standard number engraved – the lock has BS3621:2017 engraved on its faceplate
- Lever numbers engraved – the faceplate shows the number of levers the lock has
3 Lever Mortice Locks
3 lever locks are more commonly found within the home and used on bathrooms or bedrooms to provide security, trust and peace of mind in the home. Our variety of 3 lever mortice locks are far more commonly found within the home, used for bathrooms and bedrooms providing that extra layer of security. Locks4 ensure we provide you with a lasting sense of trust, security and a peace of mind in the home.
How Secure is a 3 Lever Mortice Lock?
3 lever mortice locks are not for use on external doors and are most common inside the home, these can include sash locks for garden sheds and for doors leading to a garage from an internal part of a property.
Whilst a 3 lever lock is not fit (and likely won’t pass insurance checks) for entrance into the home, they are perfect for use and peace of mind throughout a property.
Mortice Lock Brands
Our most popular mortice lock brands include Chubb which now falls under Union (932 products), TSS (936 products), ERA (604 products), and Yale (438 products).
Measuring a Mortice Lock
Measuring a mortice lock is straightforward – if you are placing a new mortice lock into an existing fitting it is important to ensure the measurements you need are clear. This will make installation faster and easier for either yourself or a local locksmith.
A mortice lock is split into two parts – the case and the forend.
The case holds the keyhole and is the part of the lock placed inside the door, the forend is the part of the lock that sits on the outside of the door.
Measuring a mortice lock backset
The backset of a lock is the measurement between the forend and along to where the centre of the keyhole
Measuring the Case Width
The case width is measured between the inside end of the case and the forend – taking into account the full width of the mortice lock.
Measuring the Case Height
The case height is measured between the top left and bottom left of the case height. Note – this does not include the height of the forend.
Measuring the Forend Length
The forend height can be measured from the top to the bottom of the forend.
Measuring the Forend Width
The forend width is measured using the top of the forend face on.
Quick Delivery, Easy Returns
At Locks4.com your security is hugely important to us and with this in mind we ensure the timely dispatch of all products, allowing you to plan for install as quickly as possible.
Further, products can easily be returned through our returns page.
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Featured Products

ASEC BS8621 Key & Turn Euro Mortice Sashlock
The Asec British Standard Euro Cylinder Sashlock is a complete set tested together surpasses the requirements for BS8621:2004. It comes complete with lock case, key & turn 70mm euro cylinder, 2 piece security escutcheons, fixings and 3 keys

BONAITI SERRATURE DIN Standard Magnetic Euro Lock
The BONAITI SERRATURE DIN Standard Magnetic Euro Lock is a DIN standard lock which takes a Euro cylinder and conforms to EN 12209 standards. It features a stainless steel 20mm front plate and is compatible with Bonaiti and Hafi handles. It has only a few moving elements ensuring reliability and no required maintenance. The lock […]

ASEC Sprung Antique Style Mortice Knobs
A sprung solid metal door knob from Asec with an antique design and a black finish.

BONAITI SERRATURE DIN Standard Magnetic Latch
The BONAITI SERRATURE DIN Standard Magnetic Latch is a DIN standard mortice latch which conforms to EN 12209 standards. It features a stainless steel 20mm front plate and is compatible with Bonaiti and Hafi handles. It has only a few moving elements ensuring reliability and no required maintenance. The lock is corrosion resistant and ensures […]

BONAITI SERRATURE B-Smart Magnetic Euro Lock
The BONAITI SERRATURE B-Smart Magnetic Euro Lock is a magnetic lock with latch and bolt suitable for Euro cylinders. It features a 22mm front plate and can be used with steel and aluminium frames. It has only a few moving elements ensuring reliability and no required maintenance, and is also corrosion resistant. The mechanism ensures […]

ASEC 5 Lever Deadlock
5 lever deadlock. EN 12209:2003 suitable for use on fire doors

ASEC BS3621 Double Euro Mortice Sashlock
The Asec British Standard Euro Cylinder Sashlock is a complete set tested together surpasses the requirements for BS3621:2007. It comes complete with lock case, 70mm double euro cylinder, 2 piece security escutcheons, fixings and 3 keys.

ASEC Rebate To Suit Asec 50mm 5 Lever Deadlock
This Asec rebate conversion kit allows the Asec 50mm 5 Lever Deadlock to be fitted to double rebated doors.

Banham M97 7L BS MDL 3 79mm PB 4K
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Union 3R35X Fire Exit Conversion Ring
Union 3R35X Fire Exit Conversion Ring

ASEC 50mm 5 Lever Deadlock
5 lever deadlock ideal for glass doors with narrow stile or Aluminium style doors.

ASEC BS 5 Lever British Standard Deadlock
This British Standard Deadlock is designed to be economical without compromising on quality and is ideal for use on external doors. It has a steel case fitted with an integral anti-drill plate, a brass deadbolt with 2 hardened steel inserts, has 1,000 differs and comes supplied complete with 2 genuine plated steel keys. It is […]

ASEC Entrance Knobset
This Asec Entrance Knobset is supplied complete with fixing screws, 3 keys and a tubular latch with an adjustable backset between 60mm & 70mm. The knobset can be unlocked by key from one side and features a snib on the other side.

ASEC BS3621 Double Euro Mortice Deadlock
The Asec British Standard Euro Cylinder Deadlock is a complete set tested together surpasses the requirements for BS3621:2007. It comes complete with lock case, 70mm double euro cylinder, 2 piece security escutcheons, fixings and 3 keys.

ASEC URBAN Easy Deadbolt
The Asec Easy Deadbolt has been designed for quick and easy installation. This tubular deadbolt is supplied complete with a choice of 2 keeps and can be fitted with either rose or backplate lever furniture.

ASEC Bolt Through Tubular Mortice Latch
This mortice tubular latch by Asec is suitable for bolt through fixing and is supplied complete with strike plate. It is available in a variety of finishes and sizes to match door furniture and has countersunk screw holes to give a flush finish and a professional appearance.