The PXG 0311 Irons are designed to be at the apex of the game-improvement class of irons. The 0311 irons feature a multi-material blade style head, integrated with a perimeter weighting system that creates an extremely high MOI head. The heads are comprised of a forged body, the interior is CNC milled for weight distribution, and then injected with a thermoplastic elastomer (TPE). The TPE used creates a more efficient energy transfer, as well as reducing vibrations. The 0311 Irons use an ultra thin face formed from HT770, very strong steel that allows for increased ball speeds. The 0311 Irons boast a winning combination, and with a proper fitting this set of PXG 0311 Irons could take your game to the apex too!