For far too long, the common way to hold a putter was by grasping it in the lifelines of your palms. While I am no fortune teller, I can tell you that this is not the most efficient way to do it. Holding the putter in the palms will mobilize the wrists and all of a sudden you have a problem with getting wristy!
Watch this short video to get a different perspective on how the hands should fit on the handle. Years ago, I learned this technique from my friend Pat O’Brien, who coached Ryder Cup Captain, Zach Johnson.