Bettinardi 2022 INOVAI 6.0 Slant Neck PutterBettinardi 2022 INOVAI 6. 0 Slant Neck Putter The newly re engineered INOVAI 6. 0 Spud was designed by Sam Bettinardi to perfect our most successful M. O. I. (Moment of Inertia) mallet to date. With two years of Tour feedback, Sam refined the 6. 0 with a 5% smaller head from heel to toe, offering a sleek, more compact design than its predecessor. The 358 gram 6. 0 features a precision milled Roll Control face from 303 Stainless Steel and a 6061