Made of high-quality ABS material that can withstand temperature exposure, stainless steel chain that can withstand up to 20kg of gravity and is not easily damaged when pulled. Child safety window restraints are widely used on most UPVC, metal, wooden, casement and sash windows. As the for limiting the opening distance, it perfectly locks out every danger in your home, so you no longer have to worry about window safety for your children or pets. Easy to use: This child safety window limiter can be installed with adhesive backing, which is not easy to fall off and will not damage the furniture surface. It is the especially when you cannot install it with screws. It is also equipped with mounting screws to meet different needs. In terms of locking design, the traditional key and password is abandoned, so you don't have to worry about losing the key or forgetting the password, and have a better user experience. Adjustable window limiter: No longer worry about the opening distance being difficult to control. Depending on the size of your , you can adjust the length of the chain to determine the size of the Space to proper ventilation while keeping your baby and safe inside. Space sizes vary from 3.5cm to 19cm, allowing more air circulation compared to upvc windows on latch. Protection upgrade: The dual-switch unlocking mode is specially designed for child safety. You need to press the buttons at the same time to open the window. It's easy for adults to open, but it's a little trickier for babies. It provides double protection, not only allowing air to enter, but also effectively avoiding the dangerous situation of children pressing one of the buttons to unlock it. note: With screws Material: ABS colour: creamy white Package Contents: 2 x Window Locks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.