The Mizuno JPX-850 driver takes adjustability to a whole new level. The JPX-850’s Fast Track technology, in addition to allowing players to vary the heel-toe weighting to change draw/fade bias, allows players to also change the club’s centre of gravity (CG)’s front-to-back placement. For precise launch, spin, and shot shape, Quick Switch shaft offers eight loft/lie choices and Fast Track offers ten settings.e club to the ball in order to maintain high ball speeds. The result is a 440cc, compact driver that can raise a player’s level of p