Selecting the proper shaft flex for your swing will help you get the most distance and accuracy from every shot.

Generally, players with faster swing speeds require stiffer shafts to keep the ball trajectory lower, while players with slower swing speeds require flexible shafts, such as a regular graphite, to produce a higher ball trajectory.
Choosing steel or graphite shafts is usually based on preferences for weight and/or feel.

Players seeking a lighter, overall weight and/or a softer feel in their irons may prefer graphite shafts, while players who prefer a standard weight club with a firmer feel may prefer steel shafts.