Guerin Rife IMO Putter

The Rife IMO putter features an all aluminum putter head with 85 percent of the total mass concentrated in the middle 40 percent from a front to rear direction. The sides are hollowed out underneath and only represent the remaining 15 percent of the heads mass. The USGA requires that a putter must be longer from a heel toe direction than from front to back. The IMO is right under this limitation measuring 4.75 inches wide and 4.60 inches deep.