01204 652211 or office@handlesandhinges.co.uk

Era, Saracen, Surelock Replacement Gearbox with Hookbolt

(7 reviews) Write a Review
DL-GBX-ERA-Hookbolt (ERAHOOKCASE35) (5055621404060)
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  • Era, Saracen, Surelock Replacement Gearbox with Hookbolt
  • Era, Saracen, Surelock Replacement Gearbox with Hookbolt
  • Era, Saracen, Surelock Replacement Gearbox with Hookbolt
  • Era, Saracen, Surelock Replacement Gearbox with Hookbolt
£32.30 Inc. VAT
£26.92 Ex. VAT


This multipoint gear box has been used on numerous door locking systems over many years and can be found on some of the major brand doors like B & Q etc.

The gearbox has a hookboltand a latch and the backset is 35mm.  The same gearbox can be used on the Saracen, Laird and Surelock systems.

The latch is easily turned around to suit both left or right handed doors using a pozi drive screw driver.


A free starbit is included to help the job along.


Measuring Guide


Simple steps to help you choose the right size backset for your Gearbox







The Backset size is A in the diagram

Measure from the the front of the main faceplate (A in the diagram) to the middle of the spindle hole. This measurement is taken when the gearbox is attached to the main front face plate.

Measurement B is the PZ Centre.





360 Degree View

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Frequently Asked Questions

You need to measure the pz (shown as “A” on our guide) and the backset (shown as “B” on our guide).
Click here to go to the guide.

This depends on your existing gearbox and whether an alternative is available and we always have to match up with the existing “holes” in your door. Call us on 01204 652211 and we can help you with this.

The most common bit used to remove a gear box is a torx t20 although in some instances a square drive can be used which can normally found in most drill bit sets.

A Dual spindle has 2 spindles at different heights. This means that the levers / moving parts of the door handle will be at different levels on the inside and outside. A Split spindle is made of 2 parts that meet inside the gearbox. The levers / moving parts of the door handle will be at the same level. A Single spindle is one long part which goes right through the door. The levers / moving parts of the door handle will be at the same level. To distinguish between a split and single spindle you will need to remove them from the door and look.

No, as you do not necessarily need to change the barrel when changing the gearbox so the gearbox is sold on its own own. If you need a new cylinder, please click here.

We try to put these guides on each gearbox page. If its not there please call us on 01204 652211 and we’ll find the instructions for you.

Unfortunately not all gearboxes can be purchased separately. Contact us if you can’t see your gearbox on our website and we can tell you if its available or not.

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Additional Information

Backset 35mm
Backset 45mm
Handle to Cylinder Size:
Locking Points:
1 Hookbolt, 1 Latch
Delivered for just £3.18
Split Spindle
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7 Reviews

  • 5

    Posted by Steve on Jan 07, 2024

    The gearbox was identical the same as my old one it was so easy to replace with no issues charge with 20 min. Would recommend this supplier to other buys.

  • 5
    Replacement Door Lock

    Posted by Geoff on Jul 06, 2023

    Lock unit gearbox failed after 10 years and didn't think I could get a replacement. Found this part from a company I had used before and after checking if the size was the same, it was, I ordered it. Arrived within a couple of days and installed within 30 minutes. Works perfect and in fact is better than the original.

  • 5
    Geared patio door lock

    Posted by Jeffrey Davies on Jul 14, 2022

    Lock is well made and is substantial quality. Fitted well with no trouble.

  • 5
    lock problem solved

    Posted by B.Cathcart on Jan 17, 2021

    The firm who supplied this door wanted £175 to replace this lock !! Problem solved for just over £30 and fast delivery too from H&H . Simple job takes less than 30 mins to do. Don't bother looking elsewhere and wasting time. H&H have the lot. Highly recommended.

  • 5
    Replacement gearbox

    Posted by Sylvia Fleming on Jan 10, 2021

    Prompt delivery and easy to fit.

  • 5
    lock case replaced

    Posted by B.Cathcart on Jan 08, 2021

    Excellent service and price. Fast delivery during a difficult period. Recommended, supplier, don't even bother looking elsewhere, H&H have the lot, plus a handy little tool supplied if you need it for the socket screws. My 'local' supplier who fitted this door wanted £175 !! for this part. H&H now bookmarked for the next time.

  • 5
    Era gearbox

    Posted by Jamesmccallum on May 30, 2018

    Purchased this to replace for old aged neighbour next door Specs were perfect Fitting was so easy also came supplied with spline bit for doing work Very good product and easy to install

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