Introducing Pacific Golf Clubs new Extreme X4 iron set with a medium wide sole, rolled back to create a DEEP CAVITY. High MOI Lower center of gravity for better trajectory. Extremely high toe and heel weighting for a larger sweet spot. These are very forgiving irons. Great for the mid to high handicap golfer. Medium wide top line. 431 stainless steel. This set compares to Callaway X-24 Hot.