Using this chalk reel is easy. First, hold the reel comfortably in your hand. Pull out the Kevlar line to the desired length, then snap the chalk line on the surface where you need a straight mark. The hook design will help you get an accurate snap. When you're done, just turn the handle, and the 6 - to - 1 gear ratio will quickly rewind the line. As for maintenance, keep the reel clean from dust and debris on the jobsite. You can wipe it with a dry cloth regularly. Also, store it in a dry place to prevent the aluminum case from rusting. Be careful not to over - stretch the Kevlar line as it may affect its strength.