MOI is a term used in physics to measure the stability of an object and how resistant it is to being twisted. High MOI putters reduce twisting on off-center putts. It is rarely talked about, but how ofter do you think you truly strike the center of the putter face? Not as often as you would like. Those off center hits typically roll off line, which leads to missed putts. If you are using a high MOI putter, it will reduce how far off line those missed putts will go. Like all things golf, we don't all hit perfect shots all the time or even as often as we would like. Better feel, feedback and straighter mis-hits can all help us play a little better!