This is the M3 disk and hollow ball styli #A-5000-7612.
This is a disc stylus that can be used to probe undercuts and grooves within bores, which may be inaccessible to star styli. Silver steel tips as used on this stylus have been hardened and ground to the tight tolerances specified by Renishaw.
| Thread mount (DG) | M3 |
| Disk Depth (B) | 5.0 mm |
| Roller Depth (L) | N/A |
| Stem diameter (DS) | N/A |
| Disk diameter (DK) | 35.0 mm |
| Disk material | Silver Steel |
| Stem material | Stainless Steel |
| Mass | 10.0 g |
