Mitsubishi Chemical Diamana Putter PTR ShaftDiamana Putter Overview The iconic smooth Diamana feel is available in your putter. Diamana Putter shafts promote super smooth and responsive feel and create a truer roll off the putter face. The Diamana Putter series features two different flex variations 1. 0 is softer and 2. 0 is firmer and both help speed control and start line on the greens. Who should try it? If you love the feel of Diamana in your woods, you should try it in your putter. Please