Callaway have introduced four new iron sets aimed at various levels of golfer (Rogue, Rogue X, Rogue W and Rogue Pro), and three new Hybrids (Rogue, Rogue W and Rogue X). It's only January, but 2018 is already shaping up to be a bumper year for irons. Why? Because the market's changing so quickly and dramatically. While Sergio – one of the world's best ball strikers – has gone for a classic set of muscleback blades this season, for the average golfer there are more tech options than ever before.