Boasting the highest inertia of any Ping putter, the Ping Doc12.5 Udrainium Series putter greatly reduces twisting, keeping putts on line and in the hole. The Ping Doc12.5 has crisp, symmetrical lines for improved alignment, have very low centers of gravity (CGs) for reduced skidding and a truer roll. Fully machined from high-grade aluminum, the Ping Doc12.5 putter features precision lines and weight placement that expands perimeter weighting to new levels. Their semicircle shape of the Ping Doc12.5 putter positions the majority of weight on the extreme perimeter and far away from the center of gravity to create an extremely high moment of inertia.