The term 'Door Attachment' refers to the various components that are used to attach a door to its frame. An ALARM is a device that emits a loud sound when triggered, and is often used as a security measure. A HINGE is a mechanical joint that connects two objects together and allows them to rotate relative to each other. A MAT is a piece of material that is placed at the entrance of a building to provide a clean surface for people to walk on. Finally, a KNOB is a handle or lever that is used to open or close a door. All of these items are commonly used as door attachments.