Inspired by ZELOS, the Greek god of rivalry, the name ZELOS was chosen to encourage competiveness among steel-shaft users who relentlessly seek progress. N.S. PRO ZELOS 7 is designed with a low kick point and evenly distributed rigidity, which delivers more than ample flexibility from tip to butt. As the world's lightest steel shaft, ZELOS7 is easy to handle with an extremely smooth swing and gentle touch, combined with the exact swing characteristics of a graphite iron shaft model. N.S. PRO ZELOS 7 employs newly developed, cutting-edge, high-intensity NZNS60 material that outperforms all other patented materials used in N.S PRO competitors' steel shafts. In fact, it delivers the smooth control and performance of high-carbon material. The superior performance of its newly developed material contributes to a more stable swing and definitive impact. Light weight and strength have been mutually exclusive. Reducing the weight of steel lowered its strength, increased the likelihood of breakage and reduced pliability required to make dynamic shots. Around 2011 however, we committed ourselves to solving this dilemma by developing a new type of steel. Even though stronger steel commonly decreases flexibility, and greater flexibility commonly decreases strength, we set our minds on developing a steel material that would deliver both greater strength and greater flexibility. After a long, arduous struggle of trial and error, we finally developed a new material that offers impressive light weight, strength and tenacity — NZNS60.