The Odyssey Dual Force 2 Putters have a stainless steel head with a new, advanced Stronomic insert that is the firmest currently offered by Odyssey. The new Dual Force 2 Putters build on a rich heritage. The original Dual Force, a classically-styled bronze putter featuring the patented black Stronomic insert, debuted in 1994. The Stronomic insert in the Odyssey Dual Force 2 putters is softer yet more resilient than the original for a pleasing sound and exceptional feedback. Odyssey inserts, which are lighter than steel, help increase the Moment of Inertia by repositioning mass from the putter face to the perimeter of the putterhead for more forgiveness and a truer roll. Dual Force 2 putters also have a co-molded, ground face which ensures a true impact surface. The insert is formed in the face cavity to create a flush fit on every side of the insert, then ground with the face for unparalleled consistency. A shot peen finish on the putter head produces a rich look that helps reduce glare off the putterhead.