- The slider moves only when the spring-loaded thumb grip is depressed.
- Allows step measurement.
Specifications:
| Metric | |||
| Order No. | Range | Accuracy | Graduation |
| 531-101 | 0-150mm | 0.05mm | 0.05mm |
| 531-102 | 0-200mm | 0.05mm | 0.05mm |
| 531-103 | 0-300mm | 0.08mm | 0.05mm |
| Inch/Metric | ||||
| Order No. | Range | Accuracy | Lower Scale/Upper Scale | Remarks |
| 531-122 | 0-150mm | 0.05mm | 0.05mm in | – |
| 531-128 | 0-150mm | 0.03mm | 0.02mm .001in | High accuracy model |
| 531-108 | 0-200mm | 0.05mm | 0.05mm 1/128in | – |
| 531-129 | 0-200mm | 0.03mm | 0.02mm .001in | High accuracy model |
| 531-109 | 0-300mm | 0.08mm | 0.05mm in | – |
| 531-112 | 0-300mm | 0.04mm | 0.02mm in | High accuracy model |
