Welcome to our shop 1. High-Quality Material: Crafted from durable rust-resistant aluminum alloy, the adjustable door and window lock feature a long-lasting black plastic cover on the key handle for extended use. 2. Easy Installation: With the included Allen key, installation is a breeze no additional tools or drilling required. 3. Hexagonal Lock Cylinder Design: This lock's unique hexagonal lock cylinder design enhances security, making it difficult to unlock and preventing unauthorized access, particularly by children. 4. Functionality: Designed to provide added safety when ventilating or securing sliding doors and windows, effectively preventing accidental falls by children. 5. Wide Range of Applications: Suitable for all types of sliding windows and doors, this lock's simple and elegant style complements most homes. (Please confirm the size suitability) 100% Satisfaction: Our customers are our top priority. If you encounter any product issues upon receipt, such as damage or incorrect quantity, please contact the seller immediately. We are committed to providing you with satisfactory after-sales service.