Now with Zero Torque. The Name Says It All. A proven PXG mallet profile, re-engineered with a Zero Torque Design to keep the face square through the entire stroke. By positioning the center of gravity just below the shaft axis, the One & Done ZT minimizes twisting forces and stabilizes the face from start to finish. The result? Less manipulation. More consistency. Putts that start on line and stay there. No twist. No miss. One & Done.