Part Finder

Find the right part for your window or door

Unsure what replacement part you need? Show us what you have.

Send photos of your window or door part and any measurements you’ve already taken. Our team can help identify the part and point you towards a suitable replacement.

WhatsApp us photos Email your photos

Email: help@gbdiy.co.uk · You can attach photos in your message.

A real customer exampleFrom a submitted photo to a recommended part

Customer photo of a door lock mechanism fitted in an open door — Customer’s photoThe existing lock in their door

GU old style 35mm door lock gearbox centre case product image — Our recommendationGU old style 35mm centre case

We recommended the GU old style 35mm centre case for this customer. We’ll check the details of your own part before suggesting a replacement.

What should I send?

Start with what you have. A few clear photos make it easier for us to help.

01The whole part

Show the complete item, or where it sits on your window or door.

02Another angle

A photo of the back, side or end can reveal the details we need.

03Names and numbers

Include any brand name, markings or codes you can see.

04Measurements

Add a ruler or tape measure if you can. We’ll ask if we need a particular size.

How Part Finder works

Send your photos

WhatsApp or email us the part you’re trying to replace.

We check the details

Our team will review the images and ask for another view or measurement if needed.

Get a product link

When we can identify a suitable option, we’ll send you a link to check and order.

Ready to find your part?

Send us a photo and we’ll help you take the next step.

WhatsApp us photos Email your photos