This back is perfect for downtuning your guitar! There are some things to consider before stringing up your six-string with these cables:
-Most normal guitars will need to have the nut filed to fit these strings.
-Guitars with a 25,5" scale length can easily be tuned to B with this pack, but 24,75" scale length guitars will probably be better at C.
-You will need to set up your guitar again, and guitars with tremelo's will need to be under more spring tension.