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Project X · Steel
Project X
Precision steel iron shaft with a stable profile.
Representative profile photo; printed weight or flex may differ from the variant you select. View full-size photo · Photo source
Verified weight and flex options
Weights and lengths are raw, before trimming. Flex codes belong to each manufacturer and are not standardized across brands. Confirm the exact tip and build instructions before buying.
| Variant | Flex | Weight | Torque | Tip diameter | Raw length | Source |
|---|---|---|---|---|---|---|
| 5.0 / 0.355 | 5.0 | 110g | Not specified | 0.355″ | 37, 37.5, 38, 38.5, 39, 39.5, 40, 40.5″ | Official ↗ |
| 5.5 / 0.355 | 5.5 | 115g | Not specified | 0.355″ | 37, 37.5, 38, 38.5, 39, 39.5, 40, 40.5″ | Official ↗ |
| 6.0 / 0.355 | 6.0 | 120g | Not specified | 0.355″ | 37, 37.5, 38, 38.5, 39, 39.5, 40, 40.5″ | Official ↗ |
| 6.5 / 0.355 | 6.5 | 125g | Not specified | 0.355″ | 37, 37.5, 38, 38.5, 39, 39.5, 40, 40.5″ | Official ↗ |
| 7.0 / 0.355 | 7.0 | 130g | Not specified | 0.355″ | 37, 37.5, 38, 38.5, 39, 39.5, 40, 40.5″ | Official ↗ |
| 5.5 / 0.37 | 5.5 | 115g | Not specified | 0.37″ | 41″ | Official ↗ |
| 6.0 / 0.37 | 6.0 | 120g | Not specified | 0.37″ | 41″ | Official ↗ |
| 6.5 / 0.37 | 6.5 | 125g | Not specified | 0.37″ | 41″ | Official ↗ |
- Wedge application limited to manufacturer W offering. Numeric flex codes retained exactly; no generic flex conversion.
Sources checked 2026-09-02. A club-type listing does not guarantee compatibility with every head or adapter.