In this how-to video, you will learn how to change a guitar string on a Stratocaster. You need a guitar, a new set of strings, and a diagonal wire cutter. You might also need a string winder. You will need a guitar tuner and a guitar cable if you have an electric guitar. First, remove the broken string from the guitar. Push the broken string down and through the bridge. Remove the other end from the tuning post. Take the correct string and unroll it. Do not bend the string in any way. Take the pointed end and push it through the correct whole that leads to the tailpiece at the front. The ball end will catch. Place the string over the groove of the saddle and pull it. Cut it about 2 inches past the nut of the neck. Stick the string into the slot of the nut and through the whole of the tuning post. Once it is inside make a bend and wrap it around the post so that it goes under the string. Bend the end over this. Keep tension on the string as you wind the tuning key. Stretch the string a little bit after the string has been wound up. Use the tuner to tune the string afterward. Strum the strings to check the tuning. By viewing this video, you will learn how to change a string quickly and effectively. This will become useful in case you are playing a gig and a string breaks.