Material: Crafted from durable zinc alloy, this sliding patio lock offers superior corrosion resistance and enhanced wear durability, ensuring long-lasting performance. 4-Piece Child Window Door Lock Set: Ensure safety in your home with our sliding patio door lock set. The window bolt lock features an easy installation process and effectively prevents accidental openings, significantly boosting the security of your windows. For maximum protection, it is advisable to install locks at both the top and bottom of the window. Includes Key: Each lock is supplied with two universal keys, allowing for easy access while maintaining security. Versatile Compatibility: This sliding patio lock is designed to fit most hinged or sliding doors and windows. It is perfect for a variety of environments, including homes, schools, and other facilities. (Please note that screws are not included.) Practical Applications: - Use on sliding patio doors to secure outdoor access and prevent unwanted entry. - Install on windows in children's rooms to ensure safety and peace of mind. - Great for schools to enhance classroom security and restrict access to outdoor areas. Note: All measurements are taken manually; please allow for a 1-3 cm variance due to lighting and display differences. Color may vary slightly; refer to the actual product received for accurate representation.