The D45 iron head's deep undercut cavity moves weight away from the face and lower in the sole. What’s more, the toe weighting expands the sweet spot further into the toe area for greater forgiveness on off center hits. The club’s progressive design can be seen in each iron’s different blade length, face height, top line, offset, bounce and MOI. This optimizes the club’s performance in distance, trajectory, spin, bounce, forgiveness and accuracy.