Door holders are devices designed to keep doors open, preventing them from closing unintentionally. They can be simple objects like wedges or more complex mechanisms that automatically hold a door in place. Door holders are commonly used in various settings, including homes, offices, and public buildings, to improve accessibility and convenience. There are different types of door holders, such as magnetic door holders, which use magnets to secure the door, and spring-loaded door holders, which can be easily released. These devices help maintain airflow, allow for easy movement in and out of spaces, and enhance safety by preventing doors from swinging shut unexpectedly.