If you are looking for a way to keep your full-length casement window in good condition, then you may want to consider using an offset stay pin. This type of pin is designed to hold the window open while allowing it to move freely in both directions.

The From the Anvil Offset Casement Stay Pin can be used for casement or awning windows of varying sizes. Made from high quality brass and stainless steel, these pins offer strength and durability that you can rely on for many years of use.