These door hangers can be hung on door knobs to keep track of when rooms have been sanitized. They are coated with a dry erase surface designed for dry erase markers, so they can be erased and re-written on. This pack of 10 door hangers comes with 1 dry erase marker with eraser top. Easy to assemble - just fold on the creases and interlock the two die cut slits. Great for workplaces, businesses, hotels, offices, libraries, schools, colleges, child care centers, hospitals, nursing homes, and more. Made in the USA.