- At the time of release, it has been reduced by about 0.2 oz (6 g) compared to the N.S.PRO Zelos7 (R). BR: Helps increase head speed and optimizes launch angle and spin rate. BR: Combines flight performance and gentle, suitable for the name of "jumping steel". (BR) The rigid design is designed to be a pre-toned but gentle from the grip side to the head side, allowing for precise and accurate impact even for golfers who dont have a high head speed. (BR) Optimized spin rate and launch angle for low loft irons and low spin of the ball. (BR) Eliminates the reduction of ball bleeding (lack of carry) caused by low head speed golfers. (BR) With the proper launch angle and spin rate, it achieves a distance performance that is not inferior to the carbon shaft. BR: We do not choose to compromise with steel and we also have a solid strike and directional stability that satisfies the satisfaction of a lifetime golfer. (BR) *Please refrain from using if the head speed is over 14.9 ft (43 m) per second with a screwdriver. (BR) Weight: 2.6 oz (68.5 g) (BR) Tip Diameter: 0.4 inches (9.02 mm) (BR) (Tone: Tip)