Optimized weight placement within each head is placed only where it benefits the golfer. Thin toplines on all irons allow for a lower center of gravity and a player's look at address. The longer irons are thinner near the compact area for increased ball speeds and distance, but transition to thicker in the short irons for precision and workability. As much mass as possible is moved to the heel and toe in the long irons for an increased MOI and more forgiveness, transitioning to a more uniform thickness in the short irons for consistency and repeatability.