Prevents accidental window openings and allows controlled ventilation Stops children or pets from opening horizontal sliding windows unexpectedly while still permitting fresh air flow. Locks windows in fully closed or partially open positions for secure, adjustable ventilation. Durable, corrosion-resistant aluminum construction High-quality aluminum body in a silver finish provides long-lasting performance and clean sight lines. Corrosion-resistant material is suitable for both residential and commercial environments. Drill-free, tool-free installation Installs quickly without drilling or permanent modification to the window frame. Ideal for renters and situations where a non-invasive security solution is required. Reinforced security against forced entry Adds a mechanical barrier to horizontal sliding windows to reduce the risk of unauthorized access while maintaining window function. Key attributes Function: Secures horizontal sliding windows in closed and partially open positions; prevents accidental openings; enables controlled airflow. Material: Corrosion-resistant aluminum with silver finish. Installation: Drill-free, no permanent alterations required. Compatibility: Designed for use on horizontal sliding windows and similar sliding openings (verify fit for your window profile before purchase). Practical use scenarios Family home: Keep living-room or bedroom sliding windows locked in a ventilated, partially open position so children and pets cannot push them open. Apartment or rental: Add security without drilling holes or altering the window frame; easily removable when you move. Small business or office: Protect ground-level or accessible sliding windows while preserving natural ventilation and sight lines. What to check before buying Confirm the product dimensions and fit against your window profile to ensure proper engagement and locking. Suitable for horizontal sliding windows; not intended for vertical or non-sliding window types. This aluminum sliding window safety lock delivers simple, non-invasive installation, reliable corrosion-resistant construction, and effective protection for homes and businesses that need controlled ventilation and improved security.