Why Buy Me? The Dreambaby® BREEZZ-SAFE® Window Restrictor is designed to help limit a window’s maximum opening distance. Suitable for most wood, PVC and aluminium hinged, sash and sliding (horizontal or vertical) windows. Brand: Dreambaby Product Type: Home Safety Product Sub-type: Guards & Locks How to Use? Also suitable for many cabinets and doors. Includes a key for added security. Functionality: Designed to help limit window openings to the recommended 10 cm (3.94 inch) / 4in to help reduce the risk of injury from falls. Allows fresh airflow.