While the Sigma 2 line from PING is designed for soft feel, the Heppler line offers options for golfers that prefer a more solid, firm feel at impact. The Heppler line features a multi-material design that includes cast aluminum and steel, which have been developed through a detailed casting process. PING engineers combined the lighter aluminum with steel through strategic shaping and weight placement to produce high MOI designs. Meanwhile, the contrasting colors of black and copper with vivid alignment aids present a pleasing look at address. Like the Sigma 2, the Heppler line also includes adjustable shaft length technology that allows golfers to easily change the length of the putter to fit their perfect setup. The PING ZB3 is a new blade design that features a single dot on the center of the leading edge for alignment and it will work best for golfers with a strong arc in their putting strokes.