Tour-Preferred Shape With Two Key Innovations This new addition to our Sink Fit Rubber family features the deep etched shape that is preferred by tour players. In addition, it includes two key innovations: our softer-feeling Genesis Material for ultimate feel and maximum feedback. And Fingerprint Technology with laser-engraved micro texture designs that “grab you back” as you grip the putter. The resulting refined feel and precise connection give you greater accuracy where you have the greatest chance to lower your score — on the greens.