Using these D'Addario EXL110 - 7 electric guitar strings is easy. First, loosen the old strings on your 7 - string electric guitar and remove them. Then, thread the new strings through the bridge and the tuning pegs. Tune each string to the right pitch. When you're playing, keep in mind that these strings can handle different playing styles well, so feel free to experiment. For maintenance, after each play session, wipe the strings with a clean, dry cloth to remove sweat and dirt. This will help keep the bright tone and extend their lifespan. Also, store your guitar in a dry place to prevent the strings from corroding. If you notice any signs of wear or a change in tone, it might be time to replace the strings.