- Measure the outside diameter of cutting tools (such as taps, reamers, end mills) with 3 or 5 flutes
- Graduation 0.01mm
- Ratchet stop
- Carbide measuring faces
- Supplied with setting standards
| Code | Range | Fluets | Accuracy |
| 3290-153A | 1-15mm | 3 | 4μm |
| 3290-203A | 5-20mm | 3 | 4μm |
| 3290-353A | 20-35mm | 3 | 5μm |
| 3290-503A | 35-50mm | 3 | 5μm |
| 3290-653A | 50-65mm | 3 | 6μm |
| 3290-803A | 65-80mm | 3 | 6μm |
| 3290-953A | 80-95mm | 3 | 7μm |
| 3290-255A | 5-25mm | 5 | 4μm |
| 3290-455A | 25-45mm | 5 | 5μm |
| 3290-655A | 45-65mm | 5 | 6μm |
| 3290-855A | 65-85mm | 5 | 7μm |
