- Features
| F57 Geometry - The universal one |
| For good machining conditions |
| Low cutting force |
| Medium feed rates |
| Two waves on the flank face |
| +/-0.025 mm cutting edge tolerance |
| +/-0.025 mm inscribed circle tolerance |
| +/-0.13 mm thickness tolerance |
| 1.4 mm width face chamfer |
| 4 cutting edges |
| 40 to 60 deg double countersink hole |
| 45 deg approach |