Ping's Craz-E G2i insert model is face balances and designed with a geometric shape for increased inertia and easy alignment. The Craz-E design features strategic weight placement near the heel, toe and rear of the putter through its geometric shape and use of lightweight urethane inserts. The result is an extremely high moment of inertia and a centre of gravity positioned low and away from the face to ensure accuracy and consistency. The crescent-shapes and an extra-long sightline contrast with the blue urethane inserts to provide an alignment aid. It sets up square and makes alignment almost effortless. A blue urethane insert, which extends across most of the face, and a blue grip provide the same soft, responsive feel golfers embraced with the introduction of the G2i putters in August 2003. The E-shaped flange inspired the putter's name, according to Vice-President of Engineering John K. Solheim, who oversaw development of the putter.