The ‘Limited Edition’ John Letters Pro F90 irons celebrate the combination of the history and craftsmanship of John Letters with 21st century technology. Only 400 sets have been made and each bears a unique stamp of authenticity on the hosel. Precision engineered and forged from mild carbon steel to offer the ultimate in control, the set progresses through the mid to short irons with a percentage of the clubhead’s weight moved from the sole to directly behind the ball. Coupled with the milled CNC cavity this provides the player with more shot-shaping ability and pin-point accuracy.