Reliance D4 Heritage Cylinder Lock Kit
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Reliance D4 Heritage Cylinder Lock Kit

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  • Free UK Delivery when you spend £75.00
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( £128.93 inc. VAT)
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Reliance D4 Heritage Cylinder Operated Multipoint Lock Kit - Our architectural heritage in the UK and Ireland is an important element of many of our finest cities and their respective period buildings. With many 18th and 19th Century buildings being listed and in conservation areas it is paramount that any front door replacements are a sympathetic reproduction of a period classic. Modern Multi-Point Locking systems which provide higher levels of security and weather performance have traditionally not lent themselves to the typical round pull door furniture and separate eye-level escutcheon which can be so common on Georgian and Edwardian doors.Reliance have addressed this problem with the D4 Heritage Locking System where the euro profile locking cylinder is at a similar height to a traditional round cylinder pull and the lock is operated automatically as soon as the door is closed. This means that an external lever handle is not required to operate the locking points and the lock can be deadlocked or opened externally by turning the key a quarter of a turn. From the inside the door can be opened by an internal thumb turn, again with a quarter turn. The door is automatically locked when closed from the inside and the key is then required to gain entry from the outside. The D4 Heritage Lock is never “just locked on the latch”. When closing the door, two solid anti-pushback hooks automatically operate to achieve instant security. The lock can be additionally secured by throwing the deadbolt with the key on the outside and thumbturn on the inside. The security nickel plated steel hooks fully penetrate the heavy duty steel keeps and help prevent forcing apart of the door and frame. D4 Heritage is Police Secured By Design, PAS23/24, SKG, and VdS1 accredited. The high performance gearbox is tested to 100,000 cycles and offers the lowest possible operating forces. Tested to PAS 023 the D4 hook shape provides low operating forces and helps doors achieve a higher level of weather performance. Protective surface coating in excess of EN 1670 : 2007 Grade 4 which is designated as ‘Very high corrosion resistance’. Police ‘Secured by Design’ stamped Each door kit includes: 1 x Door Lock Case 2 x Hook Keep - to suit door thickness of up to 44mm or 56mm) 1 x Centre Keep - to suit door thickness and handing.
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We accept payment by major credit cards, charge cards or debit cards including:



Maestro Credit & Debit Cards


Please note we do not accept the following payment methods; American Express, Payment on delivery, Email instalments, Cheque, Bank transfer or Postal Orders. Payment is only debited from your card at time of dispatch.


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Please contact us for our Delivery & Returns Policy on this product.

We endeavour to despatch your order for delivery for the next working day as standard - please let us know if you would like a weekend or special delivery.

Quest operates its own van fleet which delivers Monday to Friday to selected locations providing a friendly and reliable service. We also use trusted national carriers for UK destinations further afield.

Customers may also order and collect from us. Our Trade Counters and Customer Collection points are open from 7:00am - 4:45pm Monday to Friday.  Please call 01280 822062 to confirm your order is ready for collection. 

Cost Of Delivery

Delivery is charged at £6.00 ex VAT but is FREE on orders over £75.00 excluding VAT.  Timed delivery options are available please contact us for more details and rates if not listed.

For delivery to the Channel Islands, UK Isles, Scottish Highlands and Ireland a surcharge will apply. Please contact us before placing your order for a delivery quotation. 


Should you wish to return any items then please contact our team within 30 days of receipt of goods.  Please let us know the reason for return, and we will make arrangements for returning goods. Unless faulty, goods must be in original packaging and unused to qualify for returns. Faulty goods will be checked for misuse before replacing. Restocking charges may apply to some returns.

Email us sales@qs-sales.com or call 01280 822062.