The 3-piece tour quality golf ball features On-Ball Putt Technology (OPT). Once you discover the benefits of OPT you will begin to shave strokes off your game with its first use. OPT allows you to visually line up the direction of the putt and square up your putter face. You now have your putter's face correctly aligned to the intended line of the putt! As you watch the ball through the putting stroke, you will have a new visual focus point in your mind to align the putter face as you stroke through the putt. This action delivers the powerful mental imagery of the ProVictory, Focus Point Aiming Technology! This pack contains (1) ProVictory Golf Ball and (2) 1" Mangetic Ball Markers.