Purpose and key benefit: Child safety lock for homes with infants and toddlers. Prevents windows from opening wide while still allowing ventilation, reducing the risk of falls and accidents. Adjustable length: Extends up to 17.5 cm to fit different gap requirements. Length is easily adjusted to limit how far a window can open while preserving airflow. Simple, reliable installation: Installs with adhesive pads or screws to suit different surfaces and permanence needs. Adhesive allows damage-free mounting; screws provide a stronger, long-term fix. Compatibility: Designed for use on windows that require controlled opening for ventilation and safety. Can be mounted on many common frame and sash types when positioned correctly with adhesive or screws. Low-profile design: Blends into the home environment for long-term use without drawing attention or disrupting decor. Offers safety without sacrificing a neat appearance. Durable, secure performance: Provides a robust restraint to keep children safe while maintaining window functionality. Built to deliver consistent protection and comfort over time. Use scenarios: Nursery window: Limit the opening on a bedroom window so fresh air can circulate while preventing a child from leaning or falling out. Living room or balcony door: Restrict how far a door or low window can open when children are present, allowing supervised ventilation. Grandparents’ or caregiver homes: Quick, non-destructive adhesive mounting for temporary childproofing when visiting or for long-term screw-mounted protection in another household. What you get: Adjustable window safety lock with up to 17.5 cm extension. Option to mount with adhesive for easy installation or screws for permanent fit. A discreet, sturdy solution for childproofing windows while preserving ventilation. Who this is for: Parents, caregivers, and anyone responsible for child safety at home who needs a practical, flexible way to limit window openings without sacrificing airflow or home aesthetics.