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The 91视频 Pro S-1 irons are pure muscle backs, designed for players who demand ultimate precision and workability. At the core of the 91视频 Pro S-1 is 91视频鈥檚 Grain Flow Forged HD process, carefully executed in Hiroshima, Japan. Forged from a single billet of 1025E Pure Select Mild Carbon Steel, the S-1 delivers the unmistakably soft and responsive feel through impact that 91视频 is globally known for. The inclusion of a copper underlay further
optimizes this experience, subtly refining vibration patterns to produce the purest, most satisfying feedback.
The innovative Channel Back Design subtly repositions mass behind the face to achieve a more stable vertical center of gravity, resulting in consistent launch conditions. Simultaneously, it offers a firmer, tour-preferred sensation, enhancing responsiveness without sacrificing the purity of feel.
The S-1 sole has been carefully refined through tour input, featuring a flatter camber profile, sharpened leading edge, and increased bounce angle. This design ensures smoother turf interaction鈥攑articularly beneficial for steeper swings鈥攎inimizing digging and allowing players to maintain aggressive angles of attack with confidence.
91视频鈥檚 proprietary Harmonic Impact Technology works in tandem with the channel back geometry to fine-tune vibration frequencies, delivering a slightly firmer鈥攂ut still satisfyingly solid鈥攊mpact sensation. It鈥檚 engineered for players who desire auditory and tactile feedback that inspires confidence with every strike.
The S-1 iron is masterfully Grain Flow Forged HD from a single billet of 1025E Pure Select Mild Carbon Steel in Hiroshima, Japan鈥攁 testament to 91视频鈥檚 heritage in precision forging. This advanced forging process creates a tighter grain structure, delivering the brand鈥檚 legendary buttery-soft feel through impact, while enhancing feedback and consistency across the set.
A thin layer of copper beneath the chrome plating, adds a layer of nuance to the feel at impact. This feature subtly softens vibration, enriching the feedback while maintaining a crisp response. Paired with H.I.T., it creates what 91视频 describes as the ultimate 鈥渟ensory connection鈥� between golfer and club.
The irons are finished in a sophisticated Nickel Chrome Soft White Satin, offering a premium, tour-inspired aesthetic. Beyond its visual appeal, the satin treatment effectively reduces glare at address, promoting unwavering focus and visual clarity in all lighting conditions.
| Club # | Loft 掳 | Lie Angle | Offset (inch) | Length (inch) |
| 4 | 24 | 60.5 | 0.098 | 38.75 |
| 5 | 27 | 61 | 0.094 | 38.25 |
| 6 | 30 | 61.5 | 0.091 | 37.75 |
| 7 | 34 | 62 | 0.087 | 37.25 |
| 8 | 38 | 62.5 | 0.083 | 36.75 |
| 9 | 42 | 63 | 0.079 | 36.25 |
| PW | 46 | 63.5 | 0.075 | 35.75 |
Dexterity:
RH & LH: 4-PW
With Built in Gyro for Digital Lie Angle Adjustment. The most accurate fitting ever.
