Manual winding gear – this manual winding system (also known as Teleflex) is suitable for single or multiple windows and is very popular for applications where electric isn’t a viable option.

Folding openers – also known as cam stays, these are a hinged arm that a pole can be hooked into for high levels or simply pushed with your hand for low level windows.

Screwjack openers – are a type of threaded rod which opens the window using a pole for high windows or handle for low ones and are designed for things such as roof vents and skylights.