Measure Your Windows TrackNotice - Please check the third window track measurement picture before purchasing. In order to ensure the perfect application of window locks, please measure your window track size and the height must be Greater Than 0.75inch (1.9cm) and width must be Less Than 0.59inch (1.5cm). 2023 Innovative Design Our products offer two mounting options for different widths of window track. Each window lock is equipped with a hexagonal key. Choosing the one that best suits your needs to prevent scratching or protect your window track and improve the stability of your installation. Both way are very easy for you to install and take only 5 minutes to complete.Please check the fourth and fifth picture. High-Quality MaterialThe window safety lock is made of aluminum alloy, durable and sturdy. The anti-rust coating makes it a good match for white sliding windows, sliding doors and vertical doors. window locks is equipped with a vertical key, which can be applied to the middle track of the window, we have improved the shortcomings that other window locks are not fixed and do not fit the middle track, so you can buy with confidence. Safety Window LockIt ensures your family members safety. Effectively reduce the risk of children and pets falling from high floor. By locking your windows, it can also protect your property against damage during heavy rains and hurricanes, or guard against theft and avoid property damage during your traveling period. What's You GetThis sliding window locks is exclusively developed and designed by , It is more careful than other brands in anti-slip protection design, equipped with 4 window locks, 4 keys, 4 transparent gaskets, 8 non-slip rubber pads, 4 EVA foam lining, 1 vertical hex key and 1 installation manual. If you have any issue about the window locks, please contact us. We will reply within 24 hours.