[For Safety Use] Window restrictor hooks are designed to limit the opening of a window to approximately 100mm, helping prevent children or pets from falling out or crawling through. [Easy Installation] Requires only a screwdriver to install; includes screws and an instruction manual for quick setup. [304 Stainless Steel] Made of stainless steel for durability, high strength, and rust resistance, ensuring long-term performance. [Convenient Design] Can be manually released to allow full window opening; automatically returns to the restricted position when the window is closed. [4-Pack Set] Includes 2 right-handed and 2 left-handed restrictors for versatile installation on various window types. Suitable for homes, schools, kindergartens, and other environments. Name: Window Restrictor Locks Quantity: 4 Pack Color: Silver Material: Stainless Steel Package Contents: 2 x Right Handed Window Restrictor Locks 2 x Left Handed Window Restrictor Locks 16 x Screws 4 x Fixing Pins Note: Only the items listed above are included. Other products or accessories shown are not part of the package. Lighting and monitor differences may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm due to manual measuring.