Solid carbide twist drills within chilled 5 × D
Advantage: suitable for gray cast iron, spherulitic cast iron, cast aluminum and other materials processing centering ability, have a stable cutting edge shape can be obtained stable dimensional accuracy and good surface quality for high-speed high-feed cutting.
| Specifications (inner cooling) | Blade length | Shank Diameter | Handle length | Overall Length |
| Φ3.3-Φ3.7 | 28 | 4 | 28 | 58 |
| Φ3.8-Φ4.0 | 36 | 4 | 28 | 66 |
| Φ4,1-Φ4.7 | 36 | 6 | 36 | 74 |
| Φ4,8-Φ6.0 | 44 | 6 | 36 | 82 |
| Φ6.1-Φ8.0 | 53 | 8 | 36 | 91 |
| Φ8.1-Φ10.0 | 61 | 10 | 40 | 103 |
| Φ10.1-Φ12 | 71 | 12 | 45 | 118 |
| Φ12.1-Φ14 | 77 | 14 | 45 | 124 |
| Φ14.1-Φ16 | 83 | 16 | 43 | 133 |
