Wilson Dh6 Hybrid. New for 2006. As used by Padraig Harrington. Long iron sufferers - help has arrived! Energy Transfer Frame (ETF) technology structurally reinforces the area just behind and around the club face to optimize energy transfer back to the ball at impact. Because the crown, sole and skirt of most traditional utility clubs are very thin, energy is often lost on impact because they lack the structural strength to maximize the energy transfer most advantageously to the golfer. Through ETF, Wilson has developed a proprietary laser welding process adding a discrete and virtually weightless weld line that frames the face and captures energies previously lost in the head. This added energy directed back through the face of ETF, produces extra distance and results in an expanded, high COR or 'hot zone' area double the size of any club without ETF. This 'hot zone' produces longer and straighter off-centre hits. An internal weight in the back sole makes for a lower centre of gravity that helps to get the ball airborne and produces maximum distance. Wide, rounded sole makes it easy to hit, even from the most difficult of lies.