- Features
| F57 Geometry - The universal one |
| For good machining conditions |
| Low cutting force |
| Medium feed rates |
| Two waves on the flank face |
| 0.08 to 0.2 mm cutting edge tolerance |
| 0.05 to 0.15 mm inscribed circle tolerance |
| +/-0.13 mm thickness tolerance |
| 4 cutting edges |
| 40 to 60 deg double countersink hole |