A brass casement window adjuster is a type of hardware that is used to adjust the position of casement windows. It is typically composed of a bracket that is attached to the frame of the window, a sliding arm that is connected to the window, and a pin or handle that is used to move the sliding arm. The adjuster can be used to adjust the angle of the window, allowing for more or less air to enter the space, or to open and close the window. This type of hardware is usually made from brass or other durable metals, and it is resistant to corrosion, making it a good choice for outdoor applications.