The Project X IO 6.5 sits near the typical steel iron-shaft weight range at 4.06 oz (115 g), while its 1.9° torque is on the lower side. Its mid launch / mid spin flight profile and balanced stability character make it best suited to medium-fast or fast tempos.
Iron shaft specifications
Project X · IO 6.5 · Iron Shaft
Material: SteelFlex: 6.5Weight class: Midweight (100-119.9 g)Flight: Mid launch / Mid spinTip: Taper tip
4.06 ozWeight
1.9°Torque
6.5Flex
VariesLaunch
Material-matched benchmarks
How this shaft compares
Numeric comparisons use steel iron shafts in this database.
Weight
Typical
4.06 oz
Weight is typical among steel iron shafts in this database.
Torque
Below average
1.9°
Torque is below average among steel iron shafts with published numeric torque.
Balance point
Very low
51.5%
Balance point is very low among comparable steel iron shafts.
At a glance
Shaft profile
MaterialSteel
TipTaper tip
LaunchVaries
SpinVaries
StabilityBalanced stability
Tempo fitBest suited to medium-fast or fast tempos
Overview
Model information
| Manufacturer | Project X |
|---|---|
| Model | IO 6.5 |
| Category | Iron Shaft |
| Catalog year | 2026 |
| SKU / code | Not published |
| MPF rating | 3.5B1H |
Full specifications
Technical details
Weight & flex
Weight4.06 oz (115 g)
Weight classMidweight (100-119.9 g)
Flex6.5
Torque1.9°
Bend pointmid
Kick pointMid
Tip stiffnessmedium
Tip flexmedium
Butt flexmedium-firm
Balance point51.5%
Build & dimensions
MaterialSteel
Tip typeTaper tip
Tip diameter0.355 in (9 mm)
Butt diameter0.6 in (15.2 mm)
Shaft lengthVaries by club
Length range40.5-36.5 in (102.9-92.7 cm)
Parallel tip lengthN/A — taper-tip design
Club rangeIrons
FinishChrome / polished steel (family-based)
Flight & feel
LaunchVaries
SpinVaries
Trajectory / spin profileMid launch / Mid spin
Stability profileBalanced stability
Launch assistanceNeutral launch assistance
Feel profileCrisp steel feedback, more responsive loading
Relative weight positionTypical for steel iron shafts
Relative torque positionTorque is not normally published for this steel model
Player fit
Tempo fitBest suited to medium-fast or fast tempos
Transition fitHandles aggressive transitions well
Control vs speed biasBalanced speed and control
Long-iron playabilityNeutral long-iron playability
Short-iron controlBalanced short-iron feel and control
Likely swing-speed fitFaster iron swings / stronger players
Target playerPlayers seeking a mid-weight Project X iron shaft
Golfer fit summaryBalanced speed and control; best suited to medium-fast or fast tempos; mid launch / mid spin.