Do you rely on a latch bolt?
Do you forget to manually deadlock?
You are compromising the security of your home or office if you do.

There is a solution.

 The FinLock will automatically deadlock, delivering high security with reduced manual effort.


Due to Covid-19 the Finlock launch date is temporarily delayed.

The FinLock


The FinLock is a unique, fail-safe, high security, automatic deadbolt that will automatically deadlock every time you shut the door.

Its patented locking mechanism incorporates a balanced relationship between the trigger and the bolt to give a fail-safe auto-locking action.

The FinLock is versatile and is ideal for residential houses, apartments, communal hallways, offices, commercial premises, schools and hospitals.

It can be used in conjunction with push button lock interfaces or smart cylinders to combine keyless access with keyless deadlocking for enhanced security.

Key Features

  • Unique, fail-safe, high security, automatic deadbolt lock case
  • Built to BS 3621 specification with 21mm bolt throw
  • Tested to EN 12209 including 200,000 cycles of use
  • Security lock guards in a choice of size and finish
  • Drill resistant case in 44mm or 57mm backset
  • Standard size case, fore-end & strike plate.
The FinLock combines two unique ideas to give the ultimate automatic deadbolt.

The balanced action of the FinLock gives a fail-safe automatic deadbolt with a 21mm throw.

The automatic internal holdback allows the FinLock to be unlocked and stay unlocked in the doorframe, thus allowing other locks on the same door to be unlocked.

Security lock guards are available in a choice of size

Current finishes are polished chrome or polished brass.

Standard size case, fore-end & strike plate.  


The FinLock automatically deadbolts an external door

The FinLock shown here is fitted on the bottom of an external wooden door and replaces the typical manual deadbolt. A standard BS 3621 nightlatch has also been fitted.

The simple action of shutting the door, will engage the nightlatch as normal but will also automatically deadbolt the FinLock, with no need for keys. This ends the need for manual double locking.

An apartment door with two FinLocks automatically deadbolting

The FinLock is a perfect BS 8621 nightlatch. The FinLock has a unique holdback mechanism such that the FinLock can stay unlocked in the doorframe. This allows each lock to be opened independently therefore two FinLocks can be fitted which deadbolt simultaneously. This gives the ultimate security every time the door is shut.

The FinLock deadbolts a push button lock

The FinLock case can be combined with a push button lock whereby the push button lock’s tubular latch is replaced by the FinLock’s automatic deadbolt locking mechanism. The fail-safe action of the FinLock gives the feel and reliability of a latch bolt AND achieves the enhanced security that comes with a deadbolt. The user experience of keyless access is unchanged but the combined solution delivers enhanced security with no additional effort.

FinLock synergy with smart cylinders

The FinLock can be combined with a smart euro cylinder to give the perfect synergy of two dynamic products. The smart cylinder gives keyless multiplatform digital entry. The FinLock gives a fail safe high security automatic deadbolt, greatly surpassing any latch bolt facility currently available to smart cylinders. Together these products give a perfect combination of convenience and security.

About Us

How was the FinLock created ?

The FinLock was designed by Architect Tim Finn. The innovative idea was sparked when Tim was unable to find a dead locking solution for one of his projects.  Tim’s desire for a solution led him to design and build the first FinLock prototype. Tim has collaborated with top lock designer Andrew Taylor to create The FinLock, a unique locking mechanism.
Andrew is a Master Locksmith with over 40 years experience as a lock designer and comes from a family with a long and rich history in the lock industry.

Who we are ?

The Fin Lock Company is an affiliate member of the Master Locksmith Association and has the rights to manufacture, market and sell the FinLock.


Latest News

December 2nd 2019

Final user testing underway.

November 12th 2019

Full BS 3621 and BS 8621 classification attained.

October 29th 2019

The FinLock in featured in the MLA Expo review – view the article here

…and the Locksmith Journal – view the article here

October 21st 2019

Final elements of BS 3621 testing underway. 

October 4th 2019

Finlock wins Best Product at the MLA Expo 2019

October 3rd 2019

The Finlock will exhibit at the MLA EXPO 4 – 6 October 2019.

To be included in our introductory price offer email or for further information, get in touch.

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