Srixon is a relatively new name to the golf industry, but its parent company is not. Sumitomo Rubber Industry holds more patents for golf ball construction than any company in the world. You know them by Dunlop or Maxfli which has been producing balls since the 1930's. In 2007 when SRI, Sumitomo Rubber Industry, bought American golf manufacturer Cleveland Golf Company, they made Srixon their flagship company for golf clubs and balls. With a giant like SRI behind the Srixon name you can rest assured that every club they produce has the highest levels of craftsmanship. From their earliest models, the Z-TX iron sets or the Z 745's to the newest ZX7 Mk II irons or the Z-Forged II irons. You can find all the used single irons to build or complete your perfect set.