uPVC window handles are often described as espagnolette or for short espag window handles. A spindle protrudes from the back of the handle. SEE HERE: https://www.homesecureshop.co.uk/windows-c50/window-handles-c51/upvc-espag-window-handles-c55
Operation of the handle is achieved by simply pushing the button and opening to a holding position. The handle will automatically re-locate to a locked position upon closure. The keys supplied will provide a deadlock to the cylinder.
