The Callaway Big Bertha Regular Flex golf shaft is specifically designed for 6-iron clubs, offering a length of 37 inches for right-handed players. This high-quality shaft is part of the Big Bertha model from Callaway, known for producing top-of-the-line golf equipment. With a regular flex rating, this shaft provides a comfortable feel and optimal performance on the golf course. Perfect for golfers looking to improve their game with precision and power, the Callaway Big Bertha shaft is a reliable choice for enhancing your swing.