Men's Right-Hand Callaway Big Bertha OS
4-PW Type, Stiff Flex, Standard Length, Standard Lie Angle
Steel True Temper Speed Step 80 Shaft
The Big Bertha OS Irons are revolutionary in their construction and are full of technological club advances. These irons feature Callaway’s strong and light weight EXO-AGE head design that improves ball speed and forgiveness. The Face Cup 360™ on the faces of the clubs act like a spring on shots struck in the center, or low on the face, in addition to increasing ball speeds of off-center strikes. The Big Bertha OS Irons also feature Tungsten-Loaded Standing Wave technology and a lower center of gravity for longer carrying shots.