Mitsubishi Chemical OT Iron
The OT Iron shaft doesn’t use traditional prepreg sheet, but instead uses a new material for the golf shaft industry called Tow Prepreg. Tow Prepreg uses carbon fibers that are arranged in super-strong “bundles” (the way a steel cable is made). These bundles are impregnated with resin to create the Tow Prepreg, and then woven together like a braid.
The “braiding” technology using Tow Prepreg is incredibly resistant to twisting and ovaling and creates a shaft with no spine, so the shaft performs more consistently than a shaft made with traditional sheet prepreg. The braiding also minimizes vibration, to provide the better feedback that’s so important for iron play.
Specifications
| Shaft Name | Flex | Length (in) | Weight (g) | Tip O.D. (in) | Tip Length (in) | Butt O.D. (in) | Torque (degrees) | Kick Pt. |
|---|---|---|---|---|---|---|---|---|
| OT Iron 75 | R | 39.5 | 76 | 0.370 | 4.7 | 0.598 | 3.3 | MID |
| OT Iron 75 | S | 39.5 | 81 | 0.370 | 4.7 | 0.604 | 3.3 | MID |
| OT Iron 85 | R | 39.5 | 86 | 0.370 | 4.7 | 0.598 | 3.0 | MID |
| OT Iron 85 | S | 39.5 | 93 | 0.370 | 4.7 | 0.608 | 3.0 | MID |
| OT Iron 95 | R | 39.5 | 92 | 0.370 | 4.7 | 0.598 | 3.0 | MID |
| OT Iron 95 | S | 39.5 | 99 | 0.370 | 4.7 | 0.608 | 3.0 | MID |
| OT Iron 105 | S | 39.5 | 104 | 0.370 | 4.7 | 0.602 | 2.8 | MID |
| OT Iron 105 | X | 39.5 | 110 | 0.370 | 4.7 | 0.608 | 2.7 | MID |
Fitting
| Driver Speed (mph)/Driver Carry (yds) | 80/210 | 81-90/210-239 | 91-105/240-259 | 106/260 |
|---|---|---|---|---|
| OT Iron 75 | R | S | ||
| OT Iron 85 | R | S | ||
| OT Iron 95 | R | S | ||
| OT Iron 105 | S | X |
Tip Trimming Information
| 3i | 4i | 5i | 6i | 7i | 8i | 9i | PW |
|---|---|---|---|---|---|---|---|
| 0″ | 0.5″ | 1.0″ | 1.5″ | 2.0″ | 2.5″ | 3.0″ | 3.5″ |
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| Pack | 1 |
|---|---|
| Material | Graphite |
| Brand | Mitsubishi Chemical |
| Ball Angle | Mid |
| Torque | 2.7° |
| Shaft Type | Iron |
| Shaft Tip | 0.370″ |
| Shaft Length | 39.5″ |
| Weight (g) | 110 |









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