1putt1

How does the blade length of the MCB compare to that of the CB? Are the blade lengths consistent throughout the set or do they get shorter with the short irons?

OK, so how can I get my hands on a set of these iron blanks? They look amazing.

To TSG Whiz ... you will have no problem playing those irons in any tournament. There is no mandate from the USGA that competitors can only play irons that are on a list of conforming models. The only requirement is that the irons comply with the applicable rules for design. In terms of the groove rule there are two considerations. Since the irons were manufactured after 2010 then they must comply with the "groove rule" change instituted in 2010. As long as the blanks comply then they may be used in any tournament, even the US Open. FYI, irons manufactured prior to 2010 with non-complying grooves are grandfathered and may be used until 2024 in all tournaments except those meant for elite competition (US Open, PGA Tour, US Am, etc...). As mentioned above, the USGA doesn't mandate that irons played in a tournament be on a list of conforming models. However, In terms of driver heads this can be different. In elite levels of competition (US Open, PGA Tour, etc...) a condition of competition can be instituted which requires that competitors use a driver that is on their list of conforming models. Without that special condition of competition, you can use any driver head (even a blank) as long as it conforms to the rules. Hope that helps.