Graduation:
- Inch: .0001'' / .0005''
- Metric: 0.002mm / 0.01mm
- Jeweled bearings
- Ø8mm stem diameter for metric models
- Ø3/8'' stem diameter for inch models
- Easy to read yellow face
- Horizontal models and vertical models are available.
- Ruby contact point
- 501-02-1 is with copper body
| Model | Range | Resolution | Accuracy | Dial Reading | L | Notes |
| 502-02-2 | 0.2mm | 0.002mm | 0.004mm | 0-100-0 | 12.8mm | Horizontal |
| 502-05-2 | 0.5mm | 0.01mm | 0.013mm | 0-25-0 | 14.4mm | Horizontal |
| 502-08-2 | 0.8mm | 0.01mm | 0.013mm | 0-40-0 | 14.4mm | Horizontal |
| 502-10-2 | 1.0mm | 0.01mm | 0.013mm | 0-50-0 | 18.8mm | Horizontal |
| 502-02-4 | 0.2mm | 0.002mm | 0.004mm | 0-100-0 | 12.8mm | Vertical |
| 502-05-4 | 0.5mm | 0.01mm | 0.013mm | 0-25-0 | 14.4mm | Vertical |
| 502-08-4 | 0.8mm | 0.01mm | 0.013mm | 0-40-0 | 14.4mm | Vertical |
| 502-10-2 | 1.0mm | 0.01mm | 0.013mm | 0-50-0 | 18.8mm | Vertical |
| 502-02-6 | 0.2mm | 0.002mm | 0.004mm | 0-100-0 | 11.8mm | Horizontal |
| 502-08-6 | 0.8mm | 0.01mm | 0.008mm | 0-40-0 | 11.8mm | Horizontal |
| 502-02-6 | 0.2mm | 0.002mm | 0.004mm | 0-100-0 | 11.8mm |
Horizontal (G Series) |
| 502-08-6 | 0.8mm | 0.01mm | 0.008mm | 0-40-0 | 11.8mm |
Horizontal (G Series) |
US 9131 
GB 7258 
CA 6150 
AU 5552 
IE 4049 
NZ 1636 
IN 640 
RU 403 
