Ingersoll FM68K (Window Stay Arm lock)
This is suitable for metal fanlight windows with stay arms. It bolts closed the stay arm in the closed position.
Ingersoll SW66K (Wooden Sash window lock)
Designed for wooden sash windows, can be positioned fully closed or to allow ventilation.
Ingersoll window key Old Style
Ingersoll window key New Style
Designed to fit all (new and modern) Ingersoll window locks