Introduced in 2006, the Callie-f is a traditionally styled cavity back putter formed from one-piece of forged manganese-bronze. The C-Grooves and are precision milled into the face revealing its golden grooves. All but the grooves are then oxidized to provide a non-glare finish to the body. The Callie-f is the ultimate marriage of traditional forged material combined with the patented C-GROOVE technology, resulting in a superior roll and a soft, responsive feel.