This is the M4 tool datuming styli #A-2197-0161. Tool setting styli are fitted with a precision ground tip to ensure high squareness and parallelism.
| Thread | M4 |
| Length | 39.5 mm |
| For use on | HPPA, HPMA, HPRA, RP3 |
| Faces | 4 |
| Tip Material | Tungsten Carbide |
| Stem Material | Stainless Steel |
| Mass | 21.8 g |
