| Specification | Value |
| Product type | Full-size air impact wrench |
| Manufacturer | Ingersoll Rand |
| Model number | 231C |
| Drive size | 1/2 in. square drive |
| Drive retention | Hog-ring / friction-ring anvil |
| Configuration | Pistol grip, trigger actuation |
| Operation | Reversible, variable speed |
| Forward torque | 575 Nm (425 ft-lb) |
| Maximum reverse breakaway torque | 813 Nm (600 ft-lb) |
| Typical working torque range | 34–475 Nm (25–350 ft-lb) |
| Maximum bolt capacity | 1/2 in. (approximately 12.7 mm) |
| Free speed | 8,000 rpm |
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