This is the M2 star stylus center #A-5003-4789.
These provide maximum probing flexibility with a single probe. Taking up to five styli of the same mounting thread, this accessory allows you to build stylus configurations to your own specifications.
| Thread mount (DG) | M2 |
| Overall length (L) | 8.5 mm |
| EWL (ML) | 3.5 mm |
| Stem diameter (DS) | 0.7 mm |
| Ball diameter (DK) | 1.0 mm |
| Ball material | Ruby |
| Stem material | Tungsten Carbide |
| Holder material | Stainless steel |
| Center styli | N |
| Mass | 0.31 g |
