Details Condition Value Brand Callaway Model Big Bertha 1996 Player Type Men Clubs Type 6 Iron Individual Dexterity Right Hand Flex Senior Length Standard Lie Angle Black/None Standard Lie Shaft Callaway RCH System 75i Graphite Grip Included Has Headcover No Has Tool No Shaft Material Graphite The Callaway Big Bertha 1996-1997 (number in the middle of the sole) irons feature an oversize, cavity back head that has a patented channel running in the back of the cavity that creates more stability in the head for a more solid feel and more accuracy.