The New 675XC provides the experienced golfing connoisseur with all the benefits of playing the MOI matched 675C forged blade but with the benefit of an oversized head design. This makes it the most forgiving MOI forged iron set up possible which is due to the unique 6-steep forging die process, giving them great feel, consistent distance and flag seeking accuracy. Shaft Technology is again at the centre of Snake Eyes Custom with the new 675B, 675C & 675XC Forged Irons using the Frequency Tuned Black Gold shafts by 'True Temper'. Frequency tuned shafts provide the closest possible performance specification by matching shaft flex through the whole set using state of the art measurements to ensure every shaft is perfectly in tune with its partner. Measurement is calculated in cycles per minute (cpm) with an equal number of cpm's (4) between each club in the set and 10 cpm's between each flex, i.e., R to S etc. Simply explained! How hard would it be to play a piano or a guitar that is out of tune! Well a set of irons out of tune shaft frequency is just as difficult and rely on player correction during swing to make adjustments for the varying flex changes, these being tone changes in a piano etc. The short irons evaluate to high-pitched notes and the long irons relate to the low notes, with each iron making a tone between every club in the set. The Black Gold shaft combines a stepless design with unmatched quality and consistency that provides maximum performance shot after shot.