The M.U.S.C.L.E. Battlin' Belt was Mattel's pathetic attempt to make a carrying case for M.U.S.C.L.E.s. It holds 10 figures and has a little mini-ring at the belt buckle. I've never been too fond of this toy, unfortunately.
Not only do you look like a doof wearing this, but it only holds 10 M.U.S.C.L.E.s. That might be okay if you're playing with the Wrestling Ring but you can't have any sort of large scale battles. Also, its mini-ring is so small that it's impossible to play in. But it's part of M.U.S.C.L.E. history, and if you're big into M.U.S.C.L.E. collecting, it's a must for your collection. Oh, wait. No, it's not. Don't buy this.