During a fire some rooms are searched 2 or 3 times while others are never searched. Door Markers are manufactured in day-glow colors so they are highly visible and they can easily be recognized by touch when in place. They are convenient to carry and work better than using chalk or tape to mark doors. Door Markers are available in both single and double styles. The double style simply snaps over both knobs to prevent closing. Door Markers can be purchased plain or foil stamped with a choice of existing designs or custom stamped with your logo. There is a minimum order of 100 special markers.