What kind of bridge is it? If you don't know, take apicture or use google to find a picture of what you have so we can help you. But basically, or fixed bridges (no tremelo bar) there are 2 big flathead screws on either side of the bridge that you will screw in to lower the strings. On a tremelo bridge, a floyd rose is the same as a fixed bridge, a strat stlye, you need to do each string individually by screwing down the two allen bolts on either side of the saddle.