Offset Window Locking Mechanisms by Maco - longer length

Price £15.54 (Inc. VAT)
£12.95 (Ex. VAT)
(9 reviews) Write a Review
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Offset Window Locking Mechanisms by Maco

MACO offset mushroom bolt espagnolettes for outward opening double glazing windows incorporate all the benefits of safety and security expected of modern window technology in today´s environment.

PLEASE NOTE: Due to postage contraints the 800mm, 1000mm and 1200mm can only be sent via courier and not through the normal mail.

 Available with 20mm or 25mm backset (Click here if you are unsure how to measure the backset)

The width of the faceplate is 16mm

These are described by industry standard lengths, but the actual length may differ slightly. see diagram below for specific measurements.

  • 800mm    20 or 25mm backset, window lock / mechanism           (Actual length 780mm)
  • 1000mm  20 or 25mm backset, window lock / mechanism           (Actual length 980mm)
  • 1200mm  20 or 25mm backset, window lock / mechanism           (Actual length 1180mm)

Shorter lengths also available, click here to go to the "shorter lengths" page


  • 310mm    20 or 25mm backset, window lock / mechanism           (Actual length 290mm)
  • 400mm    20 or 25mm backset, window lock / mechanism           (Actual length 380mm)
  • 600mm    20 or 25mm backset, window lock / mechanism           (Actual length 580mm)




Measuring the backset on a window espag mechanism:



Not sure what window lock you need?  Call us on 01204 652211 for free advice


Information from the manufacturer

Offset espagnolette bar designed for profiles without a eurogroove. 
Profile related keeps with night vent position.
Adjustable mushroom cams.
19mm cam travel.
360 hours salt spray corrosion resistance.

Espag Lock Backset Measuring Guide







To Measure the backset on your window lock you need to measure from the middle of the spindle hole to the front of the face plate. Take a look at the picture below and the red arrows show you where to measure.


The holes that the Bolts go through are a set distance and are the same on ALL window locks (43mm).



9 Reviews Hide Reviews Show Reviews

  • 5
    Good replacement

    Posted by Tom on Jul 01, 2019

    The threads for the handle bolts had stripped on my existing windows, meaning that the handle did not stay attached & the window was inoperable. This was a easy, quick and simple direct replacement, now my window handle works like new again!

  • 4
    not a bad bit of kit

    Posted by Jon on Jan 14, 2019

    The unit does not match the previous so I had move the keeps, other than that OK.

  • 5
    Replacement lock

    Posted by Paul on Jun 28, 2018

    First class service quick delivery and expert advice. Easy to fix oneself using few tools dies the job perfectly. Would highly recommend this company.

  • 5
    Fits well

    Posted by Neil on May 18, 2018

    Different from that removed but fitted well after a bit of drilling

  • 5
    Window locking mechanism

    Posted by Kimberley bourne on Mar 26, 2018

    Excellent service, product and delivery time thank you!

  • 5
    window locking mech

    Posted by Dave Douglas on Sep 07, 2017

    ordered in minutes following clear instructions,delivered next day,fitted in 10 mins

  • 5
    Offset Window Locking Mechanism by Maco -Longer Length

    Posted by Mary Levy on Aug 29, 2017

    Great Service with acurate description on how to measure really please saved us lots of money being in a position to fix problem

  • 5
    Excellent as usual

    Posted by E Jones on Aug 05, 2017

    Have bought window and door locks many times and the service and quality of goods is always first class.

  • 5
    Maco 800mm window lock

    Posted by Victor Perham on Jun 22, 2017

    Had good advice on suitable product from Handles and Hinges, product arrived next day and fitted perfectly with little adjustment. Works really well, in fact better than original.