- Measure the web thickness of drills, small grooves and keyways
- Graduation 0.01mm
- Ratchet stop
- Carbide tips
- Supplied with setting standards (except 0-25mm)
| Code | Range | Type | Accuracy | L | b |
| 3230-25A | 0-25mm | A | 4μm | 57 | 32 |
| 3230-50A | 25-50mm | A | 4μm | 82 | 44.5 |
| 3230-75A | 50-75mm | A | 5μm | 107 | 57 |
| 3230-100A | 75-100mm | A | 5μm | 132.6 | 69.5 |
| 3230-25BA | 0-25mm | B | 4μm | 57 | 32 |
| 3230-50BA | 25-50mm | B | 4μm | 82 | 44.5 |
| 3230-75BA | 50-75mm | B | 5μm | 107 | 57 |
| 3230-100BA | 75-100mm | B | 5μm | 132.6 | 69.5 |