windows

The handle and lock on my window has stopped working and will not turn. Have taken the window apart and am still unable to fix. Does anyone know what type of locking mechanism this is called and any ideas where I can get a new one? Thanks!

Hi everyone, I am hoping to get some advise on how to replace the sealed units in my double glazed aluminium vertically sliding sash windows. I've already bought the new spiral hangers, so I will be taking the sashes out to change them and was hoping to change out the broken sealed units too...