So I noticed these new strings on the racks I never seen before.. the nice girl at the guitar center said they were new.. last time I got strings a few months ago, they weren't there. Apparently they are brand new. Called M-Steel Earnie Ball's, According to the back of the package, they have 60 percent more cobalt in them then their cobalt line of strings. They were 2 bucks more then the cobalts as well. So thought I would give them a shot. Was in the market for some thicker strings for lower tunings. I got 11/48s. My impression, they rock. Especially on the wound strings, a MUCH better tone out of them then even my old cobalts, I recommend giving them a try.