Miura forgings are recognized within the golf industry as the best in the world
against which all other forged irons are judged. 
Miura’s forging techniques rearrange the molecular structure of the mild steel in a pattern that is uniform throughout the clubhead. This eliminates void spots in the clubface, ensuring that every Miura club in your bag has the distance control, ball flight, spin and feel that will satisfy the most discerning golfer.
This tightness in the grain structure of the metal is what gives Miura made clubs the controlled, soft feel that other manufacturers cannot achieve.
Miura also uses a proprietary “spin welding” process to produce the industry’s most
consistent hosel. This unique procedure ensures that the bore depths and the
hosel heights are identical in every Miura head and the shaft of every club will
be
perfectly centred.
Considering the above, it is hardly surprising that many of the biggest name
manufacturers in golf use Miura to forge special sets of irons for their best tour
players, several of which are Major winners.