Shaft Flex
1 articleShaft flex describes the broad bending-stiffness classification of a golf shaft, often shown by manufacturer-specific letter labels. Flex designations are not fully standardized across all brands and models. The label should not be equated with shaft weight, torque or the complete bend profile, each of which addresses a different part of how the shaft behaves. The exact scope of golf shaft flex classification needs to be checked against the specific version or configuration under discussion.
UST Mamiya Recoil ZT9 graphite shaft challenges steel in iron sets
UST Mamiya's Recoil ZT9 graphite shaft claims low torque and a softer feel, aiming to give iron players more power and comfort than steel. Independent sources, however, have yet to confirm its specs or widespread use.