Ensure Child Safety: The window child lock restrictor is designed to restrict opening distance of windows and doors to help reduce the risk of injury from falls. Meantime allows fresh air flow. Suitable for most wood, PVC and aluminum hinged, sash and sliding (horizontal or vertical) windows. An ideal choice to ensure the safety of your children or pets. Easy to Install: This cat window restrictor come with strong adhesives, no drilling into your window frame, just simply peel off the adhesive film and attach to the window. Also comes with spare stickers so we may reuse once the new windows in to save drilling near the new windows. You can also install using the included screws for double safety. Warm tips: Please Measure before purchase. The width of the window frame should be less than 5cm/2in, or the lock will go over the frame edge. Simple and Practical: Designed with a 360 swivel steel cable, so that no matter what side or angle you install the plates, the cable will swivel and hang down out of the way when unlocked. Simply turn the key to open the lock, no awkwardly fumbling with combination locks, misplacing padlocks, or going hungry because you forgot your number combo! Only one hand is needed to operate. (Keyed alike) Strong Sturdy Design: The refrigerator lock is made of strong metal bullet head and high tensile steel cable, more sturdy and durable. Tested to withstand a horizontal force of 100 kg. Wide Application: These childproof window locks are also suitable for many cabinets, drawers and doors. Also be used to hold down toilet seats and seal off the doors of microwaves, freezer and other appliances. This ensures your child to explore in a safe home environment.