The Open'n Stop child safety gate comes with a 9 cm extension. This allows it to be flexibly used for door frames or stair railings with widths of 84 - 89 cm. All of these models can be further customized with additional extensions of 9 cm and 21 cm and can be combined with Y-spindles to secure them to stair railings with round posts. Installation is quick and easy. The metal safety gate is secured between walls or door frames using fixing screws, and no drilling is required. The Open'n Stop features a manual closing mechanism that reliably locks into a child-safe closure. Thanks to the double safety feature, it can only be operated by adults. The Open'n Stop can be opened in both directions with just one hand, keeping the other hand free for your little one. With the Open'n Stop safety gate, you can create a safe environment for children as well as pets in your home. Note: This product is a self-adjusting safety gate, meaning that any initial misalignment or gap in the side part is corrected by tightening the fixing screws in the frame.