This single hole (22.5x11x17mm) and double hole (45x17x11mm) configuration weighs 15g / 25g each, ensuring longer life than other products Drill-free stainless steel window with enhanced security combines ease of installation (50% faster than traditional locks) with durability for residential protection The limiter push-pull mechanism allows for easy maneuverability of all ages while maintaining window ventilation control, reducing the risk of injury in high-traffic home areas You can adjust the position to prevent accidental closing and unauthorized access while keeping sliding doors, windows and balconies safe in your home, office, or retail space Ideal for renters, parents, and commercial property owners who need a user-friendly security solution without compromising structural integrity, without causing damage, Manufacturer: Netbiio