- Measure root tangent length of gear
- Graduation 0.01mm
- Non-rotating spindle
- Ratchet stop
- Supplied with setting standards
| Code | Range | Accuracy | Parallelism | L | b |
| 3294-25 | 0-25mm | 4μm | 5μm | 34 | 24 |
| 3294-50 | 25-50mm | 4μm | 5μm | 59 | 32 |
| 3294-75 | 50-75mm | 5μm | 5μm | 85 | 45 |
| 3294-100 | 75-100mm | 5μm | 5μm | 110 | 57 |
