Ping K15 Driver (10.5 deg) The game-improvement Ping K15 driver (9.5, 10.5 and 12-degree lofts) is engineered to help golfers bring their shots back on line and back in play using 'Straight Flight Technology'. Has a little more weight in the heel than the G15, identified with a slightly different sole profile. This helps rotate the clubface to a more square impact position. TFC 149D graphite shaft flexes: L, Soft R, R, S and X