This window can be strongly locked when closed,and protecting you and your family from threats. Make from Zincs alloy component,have excellent hardness,wear resistance and anticorrosion and rusts resistance. With mounting screws,the installation process is simple and quick. Suitable for left or right opening sash,flexible to adapt to different types of Window. Enhances the levels of and protections of window,but also harmoniously blends with various home decoration styles,adding elegant yet practical senses of beauty.