PXG 0317 CB Players Irons feature a three-times forged body. precision milled face and back along with PXG�s proprietary Precision Weighting Technology to provide extreme shot shaping. high spin performance. and superb distance control. These cavity back irons feature a longer blade. thicker top line. and a wider sole compared to 0317 ST Players Irons. while still being compact enough to control the shot shape. The cavity back design keeps the clubhead more stable during off-center hits allowing for a higher MOI and increased forgiveness in a tour-style blade.