Used Callaway Big Bertha 2006 4 Iron / 23.0 Degrees / Uniflex Flex
Shaft Flex: Uniflex Flex (Regular Flex). Shaft Model: Callaway Uniflex. Model: Big Bertha 2006. Used Callaway X-18 PW Iron / Uniflex Flex. Used Callaway X-16 Pro Series 5 Iron / Uniflex Flex. Grip Details: Callaway.