- Model: Z 545 - Head Shape: Pocket Cavity Back - Shaft: Carbon recoil 95g F3 (equivalent to SR) This is a set of 6 irons: 5, 6, 7, 8, 9, PW. They show signs of use, but are still usable. They are very forgiving and provide good distance. The shaft is listed as equivalent to SR in the catalog, but personally, it feels closer to S. I think it's a sturdy shaft. The grips have been changed to Mizuno grips, but they are still usable. DUNLOP Dunlop SRIXON FORGED Forged Mamiya mamiya UST Masterpiece