It seems like you're describing the Fitaza Automatic Door Closer, a multifunctional device designed to automatically close doors, particularly internal and outdoor iron doors. This device typically works by using a drawstring mechanism to facilitate automatic closing once the door is opened and released. Automatic door closers can be convenient for ensuring that doors are securely closed, particularly in environments where doors need to be kept closed for safety, security, or energy efficiency reasons. When considering such a product, it's essential to verify its compatibility with your specific door type and size, as well as its installation requirements. Additionally, understanding the mechanism of operation and any potential maintenance needs can help ensure its effectiveness and longevity. As with any home improvement product, it's advisable to follow the manufacturer's instructions carefully during installation and use to maximize safety and functionality.