What are the different types of casement window stays available in the market and how do they differ in terms of design and functionality?

Casement window stays come in various types such as telescopic, friction, and quadrant stays. They differ in design and functionality based on how they operate and secure the window. Telescopic stays are adjustable in length, friction stays use friction to hold the window in place, and quadrant stays have a traditional look with a locking mechanism. Each type offers unique benefits in terms of ease of use and security for casement Windows.