- Graduation 0.01mm
- Ratchet stop
| Code | Range | Stem | Spindle tip | Remark | Accuracy |
| 6381-25 | 0-25mm | with clamp nut | flat (carbide) | 3µm | |
| 6381-25W | 0-25mm | plain | flat (carbide) | 3µm | |
| 6381-25S | 0-25mm | with clamp nut | spherical (SR5) | 3µm | |
| 6381-25WS | 0-25mm | plain | spherical (SR5) | 3µm | |
| 6381-25P | 0-25mm | with clamp nut | flat (carbide) | with spindle lock | 3µm |
| 6381-25Wp | 0-25mm | plain | flat (carbide) | with spindle lock | 3µm |