Door stoppers are devices used to prevent doors from closing completely, and can be classified into two types: fixed door stoppers and adjustable door stoppers. The fixed door stoppers are installed on the floor, and can only be moved after being removed. The adjustable door stoppers are usually made of rubber, and can be adjusted to fit different thresholds. Door stoppers are usually used in places such as hotels, hospitals, and public buildings, and are an important component of our daily lives.