Due to its symmetrical design, it's possible to accidentally fit the bridge on backwards on the two posts. This can lead to a certain amount of confusion if the bridge is ever removed for any reason. Conventionally, the string length (intonation) adjustment screw heads of the ABR-1 bridge face the neck, and the screw heads of the newer "Nashville" bridge face the stopbar. Unless the player wishes to completely reset the action and intonation, it is important to refit the bridge in the same orientation as before a string change, regardless of which way round it was to start with.