Item Type: Window Lock Material: Aluminium and stainless steel Individual Size: Approx. 6 x 2.4 x 2.4cm / 2.36 x 0.94 x 0.94in Suitable for Rail Height: Over 1.5cm / 0.59in Applicable Rail Thickness: No more than 1.6cm / 0.63in 1、2 Fixing Holes: This window lock features an upgraded protective design with two fixing holes for each lock, securing it to the window rail and greatly enhancing the lock's holding power on heavy windows, doors with double hole locks for added security. The window locks also come with a protective pad to prevent scratching or damage to the window and improve stability.  2、Protect Your Family: This window lock keeps your family safe by controlling the partial opening or closing of your windows, which effectively reduces the risk of children and pets falling from high windows. With a lock on your windows, which will also protect your property from damage during heavy rain, hurricanes and protect against burglars and thieves.  3、Wide Application: This window lock can be easily adapted to most environments, this sliding window lock is suitable for homes, bedrooms, nurseries, offices etc, which also improves air circulation at the same time.  4、Easy to Install: This window lock can be installed quickly in just three steps without additional installation tools or drilling. You can fix the window lock to any part easily with a vertical key or hex key, making it easy to reuse and reinstall.  5、Robust and Durable: The window lock is robust, superbly crafted, with an aluminium frame and stainless steel screws, and can be reused many times.