Ping irons can be reshafted to fit a variety of flexes in both steel and graphite. Generally, irons should have a stiff flex to assist with accuracy and consistency. However, a softer flex or graphite can produce an increase in distance. The procedure requires a certain level of expertise and should only be done by a professional, as it can be dangerous and damaging to the club if done improperly. Professional club fitters can be found at most golf retail outlet stores as well as your neighbourhood golf course
Heat the hosel linking the shaft to the head using a heating gun. Heat until the adhesive apoxy melts completely.
Remove the shaft delicately and allow the head to cool.
Use a rolled up piece of sandpaper to scrape and clean inside the hosel.
Fit the new shaft with the replacement ferrule and hold with the grip end on the ground.
Drip epoxy into the hosel of the club head and slide it over the tip of the new shaft.
Forcefully link the club head and new shaft together until it is flush against the ferrule.
Allow the club to set for 24 hours before using.