The Sash Stop Window Restrictors are designed to improve safety, security, and ventilation for sash windows. These key-lockable restrictors help prevent accidents by limiting how far the window can open, making them particularly useful for child safety. Additionally, they enhance security by deterring intruders while still allowing for controlled airflow. Suitable for both modern and traditional sash windows, these restrictors provide a discreet yet effective solution for secure and flexible window operation.