Hitting Surface in Tungsten, The center of gravity is pushed forward which leads to a more stable impact with less turning motions on off-hits. This makes your putts go straighter and fewer misses if you aim correct.

Unique feel, Each model has visible changeable weights in the sole as well as individually built in counterweights. This creates a unique feel to all the different models.

2135 Sightechnology, The 2135 technology where you have the sightline 21.35 mm from the ground, are the exact middle of the ball and the optimal place for a sightline. This makes it easier to aim however you stand up. The sightline never moves in relation to the ball regardless if you have your eyes on top, behind or in front of the ball. Only on mallets.