| Specifications of hss twist drill set | |
| size | 10.0mm-25.0mm |
| Helix angle | 20-30° |
| Diameter tolerance | H8 |
| Right hand cutting ,type N Reduced shank to 10 mm | |
| Constructed of High speed steel Conbination of strength, heat-resistance and wear-resistance | |
| Usage for Metal Drilling, cast steel, grey cast iron, malleable iron, sintered metal and low hardness alloyed materials | |