"This multi-function whiteboard line tape can be used to create a permanent line on whiteboard. It is recommended that you draft the line before using the line tape.How to use: Ensure board surface is clean and dry. Stick the end of the tape firmly to the board, pressing the tape using your finger and slowly glide the dispenser:Along a ruler edge for a straight line Along a curved edge for a circle. Lastly, press tight and tear the line."