The National Marker Company tag has the legend ?DANGER ? THIS ENERGY SOURCE HAS BEEN LOCKED OUT ? THIS TAB & LOCK TO BE REMOVED ONLY BY THE PERSON SHOWN ON BACK? on the front and the legend ?DANGER - EQUIPMENT LOCKED OUT? on the back. It informs workers or employees that an energy source has been locked out and that the tag can only be removed by the person shown on the back. It is mostly used in the industrial and manufacturing units to enforce safety measures. The tag has blank space at the back to write instructions for workers and concerned personnel. The danger tag is printed in bold and legible text to ensure clear visibility even in poor lighting. Using OSHA safety tags that carry important warnings or status updates are a part of common safety measures in many places.