- Features
| D51 Geometry - The quiet one |
| Ant-vibration geometry |
| For tools with extended tool projection |
| +/-0.025 mm cutting edge tolerance |
| +/-0.025 mm inscribed circle tolerance |
| +/-0.13 mm thickness tolerance |
| 1.8 mm width face chamfer |
| 2 cutting edges |
| 40 to 60 deg double countersink hole |
| 90 deg approach |