Security Window Auxiliary Lock Set of 2 Recommended as a security measure, and also for double safety in homes with pets or small children. 【Security Features】 This product can prevent malicious intruders by attaching it to windows. It is specifically designed to prevent external intrusion. 【Easy Installation】 Installation is very easy and requires no tools. The installation range is approximately 28-42mm, and it is compatible with various windows. 【Durability】 Rubber is used as the material, making it highly durable and suitable for long-term use. 【Size】 Approximately 60 x 40 x 37mm (thickness) Anonymous shipping. Please understand that this is a used item stored at home.