Where swing speed is crucial for a competitive edge, the MT OS Iron offers extra power in its design for all golfers looking for greater swing speed and accuracy. The 17-4 stainless steel body with Cup Face 360° Technology means there are no welds anywhere on the face, so the entire face is the sweet spot. Therefore, even off-center or miss hits will send your ball on target. The MT-OS irons have a consistently thin Cup Face for maximum rebound effect at slower swing speeds. The deep undercut channel for optimal weighting combined with a wider sole and slightly thicker top line, maximizes the depth of the center of gravity (CG) while minimizing the CG height to launch the ball farther. This club is specifically designed to inspire confidence no matter what your skill level. Configuration: Men's 4H, 5H, 6-W, GW or Senior 4H-6H, 7-W, GW (8 iron sets), SW available. Men's Micro-step Lightweight steel, Men's graphite