X-Factor Super Zolex Men's Hammer Driver (Right Handed, 10 Degree Loft, Regular Flex) High-quality men's driver designed by 6-time long-drive champion Jack Hamm 21st-century metal construction is 300 percent harder than titanium but twice as light Patented 45-inch Triplekick Smartshaft increases club speed by roughly 25 percent World's largest clubhead at 595mm; G-Force technology maximizes center of gravity 10-degree loft angle; aerodynamic jet wing design; shaft fits all golfer sizes