Titleist 975D driver. Tiger Woods used a Titleist 975D to win his amazing Major Grand Slam. Pear-shaped, titanium-headed deep-face driver features a unique hosel and thru-bore shaft design. The reinforced face-crown junction stiffens the head to provide increased ball speed and a sweet, solid feel. The internal weight and wall thickness are carefully managed to provide a flatter more penetrating ball flight. A true player's club and very workable.