EXPLOSIVELY SOLIDThe JPX850 breaks all the normal rules of golf equipment – with a face that flexes past the competition limits placed by the USGSA & R&A on drivers. The breakthrough in ball speed & distance is achieved through increasing the flexible portion of the clubface. A reinforced frame around the clubface makes it play effectively larger, without increasing its size. Equally as important, the framework ensures ball speeds are consistently high across the entire clubface & that high COR is not created at the expense of feel or control.POWER FRAME Enables entire face to flex for increased ball speeds HARMONICALLY TUNED Short top frame edge controls vibration.DUAL RELIEF ZONE SOLE Cut away back edge plays effectively narrower.REVERSE SET FLOW Long irons feature longer blade length than pitching wedge.