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Securistyle Latch 3 Deadbolts Split Spindle Multipoint Door Lock

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Alternative products available

DEF351622 See Alternative

This part is discontinued and is no longer available.However, part: 54350019AA is a potential alternative. This ERA is a really close match for the Securistyle lock, with a small amount of adjustment to the keeps required.The Securistyle... read more
Product Information

This part is discontinued and is no longer available.

However, part: 54350019AA is a potential alternative. This ERA is a really close match for the Securistyle lock, with a small amount of adjustment to the keeps required.

The Securistyle Defender door lock features 3 deadbolts and a snib for the latch.

Operation: Split Spindle

To lock the door

1. Lift the handle upwards to engage the locking points.

2. Lock the locking points and main deadbolt (if present) by turning the key.

To unlock the door

1. Unlock the system by turning the key.

2. Push the handle downwards to disengage the locking points and retract the latch.

Latch Reversal:Undo the screw or screws (depending on the model) in the latch to remove. Reverse, reinsert and replace screw(s).

You may find this lock used as an UPVC door lock, an aluminium door lock, a timber multipoint door lock or a composite door lock .

Product Specification
Product Documentation
Product FAQs

How can I tell who the manufacturer is of my multipoint lock?

Check down the faceplate and look for a brand name or logo to identify the manufacturer.


How do I find out the operation of my multipoint door lock?

  • 1. If you only use the key to unlock all of the locking points then the operation is called Key Wind.
  • 2. If you lift the handle and turn the key to lock then the operation is called Lift Lever.
  • 3. If from the outside you unlock with the key, pull handle down to disengage the locking points and turn the key to open the door then this operation is called Nightlatch or Split Spindle.
  • 4. If lifting the handle fully locks the door without the use of a key then this operation is called Auto Locking.

How do I measure my multipoint door lock?

Always measure in millimetres.

  • 1. Backset – Measure the distance from the edge of the faceplate back to where the key goes into the door cylinder.
  • 2. Centres – Measure the distance from centre of handle spindle down to where the key goes into the door cylinder.
  • 3. Locking points – Measure the distance from centre of the locking point to the centre of handle spindle then repeat for other locking points.
  • 4. Faceplate – Measure the distance across the width of the face and full length of the faceplate.
  • 5. Gearbox – Measure the height and depth of the gearbox.

How do I know if my multipoint door lock is left or right handed?

99% of multipoint door locks are field reversible, instructions for which are under product information. For those models which are handed please refer to the handing chart to determine which hand you require.


Do you have a gearbox for this multipoint lock?

No a gearbox is not available for this model.

All product options

All product options
Product Code Backset Faceplate Operation DiscountPriceStockQuantity
DEF351622
35mm
Flat 16mm - Square Ends
Split Spindle
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