These are generically known as Fitch Catches and we do many different types - we also remake some of the obsolete ones.
These are used on sliding windows - either Vertical Sliding Sashes (VSS) that slide up and down or or on Horizontal Sliding Sashes (HSS) that slide horizontally.
We have just made another batch of these.
These are the cams, ready for assembly.
These are the assembled catches.
If you are looking for catches that work on sliding windows, please give us a call on 0116 2742195 or drop us an email on firstname.lastname@example.org