garyt1957 MOI on the DB455 was like 3700, pretty much every new head now is 5000.
And, of course, that means everything ....to everyone ....hitting any driver.
NOT!!
It does mean a helluva lot to those selling drivers, though.
Do you really think, as an example, that Dustin Johnson could not hit a 455DB the same as his current driver, given to his club builder to build for HIM?