ARGGGGGGG!
I just got a brand new set of 5 string Ernie Ball Cobalts for my Fender American Pro II P Bass V. I was so excited to try these on this bass. Ran the B string through the body onto the bridge then to the tuner. Wound it up and SNAP! As the string tightened at the bridge post the tension of the string being bent cause the winding to break apart. Thus causing the string to unwind as I tightened the it. OMG! I wish I had known this I would have just ran the string from the back of the bridge and not through the body. Now I go no B string for this set.
Sorry just venting and trying to give a heads up to others that if you use these strings and if you have a bass that strings through the body don't string them through the body. They will break. 
I just got a brand new set of 5 string Ernie Ball Cobalts for my Fender American Pro II P Bass V. I was so excited to try these on this bass. Ran the B string through the body onto the bridge then to the tuner. Wound it up and SNAP! As the string tightened at the bridge post the tension of the string being bent cause the winding to break apart. Thus causing the string to unwind as I tightened the it. OMG! I wish I had known this I would have just ran the string from the back of the bridge and not through the body. Now I go no B string for this set.