Cobra KING CB/MB Iron Set Right HandedCobra KING CB MB Iron Set The CB MB Irons are available in multiple set configurations depending on your gapping and aesthetic preferences. A combo set flows from more forgiving, cavity back long irons (4 6 iron) to muscle back short irons (7 PW) designed for scoring precision, while full CB and MB sets are available in custom. The CB MB combo flow set prioritizes precise shot making in your short irons with added stability and forgiveness in the long