- To check and set screw cutting tools, and check the angle and pitch of screw thread
- Angle accuracy: ±30min.
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| Code | Thread type | Angle (α) | Graduation |
| 4810-601 | METRIC 60° | 60° | 0.5mm and 1mm |
| 4810-602 | UNIFIED 60° | 60° | 14ths and 20ths on front side, 24ths and 32ths on back side |
| 4810-55 | WHITWORTH 55° | 55° | 14ths and 20ths on front side, 24ths and 32ths on back side |
