Features: Multiple angled Adjustable Window Restrictors with high strength materials enhances ventilation control and security, offering easy installation for over 80% of window types. Features builts in lock mechanism and sturdy coating, ensuring durability in humid climates while preventing forced entry. Ideal for family with kids/pet, ground floor residents, and novices seek home safety upgrades. Designs for residential and commercial space, particularly coastal regions or apartments requiring sturdy window lock and adjustable airflows. Engineered with 360 degree rotation capability and childproof security, these window stops maintain structural integrity against weathering while enabling customizable ventilation angled. Specifications: Materials: ABS Size: 6x5cm/2.36x1.97inch Package Includes: 4pcs Window Restrictors note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.