The dual-durometer insert of the G5i Series provides the feel and distance control golfers long for on putts of all lengths. The combination of the soft perimeter and firm impact area means golfers can lag with confidence and be firm when it counts the most. Sole cavities and thru holes allow expanded perimeter weighting, resulting in high moment-of-inertias in each putter in the series. The putter's reputation for quality and consistency is furthered by the precision machined insert cavity.  The most popular PING models have been improved with this technology, providing golfers with options for all types of putting strokes, ranging from face-balanced models like the Craz-E, to the popular Anser model.