Superstroke's revolutionary pentagonal profile increases stroke consistency due to its wider flat-front and multiple edges. The FLATSO with CounterCore Technology lets the golfer fine tune the feel and stability of the putter by adjusting the weight of the grip. Adding a 50g back-weight engages larger muscles in the arms, shoulders and back, which results in more of a pendulum motion. Plus, their patented NO TAPER design promotes even grip pressure, which leads to better putting. It can also be played without the additional weight if you prefer.