Specifications
extra long hss twist drill*4241,4341,9341,6541,M32 and M42
*ISO 9001 standard
*plastic sleeve packing
*we are factory
extra long hss twist drill
1.Material:4241,4341,9341,6541,M32 and M42
2.Fully ground,roll forged and edge forged twist drill
3.Special tip and more sharpness
4.Application:More than 5MM stainless steel, spring steel, special steel, hardness of HRC40 within the metal block, opened die punch ect.
| Number | SIZE(mm) | Number | SIZE(mm) |
| 1 | 3x300 | 22 | 3x350 |
| 2 | 3.5x300 | 23 | 4x350 |
| 3 | 4x300 | 24 | 5x350 |
| 4 | 4.5x300 | 25 | 6x350 |
| 5 | 5x300 | 26 | 7x350 |
| 6 | 5.5x300 | 27 | 8x350 |
| 7 | 6x300 | 28 | 9x350 |
| 8 | 6.5x300 | 29 | 10x350 |
| 9 | 7x300 | 30 | 11x350 |
| 10 | 7.5x300 | 31 | 12x350 |
| 11 | 8x300 | 32 | 13x350 |
| 12 | 8.5x300 | ||
| 13 | 9x300 | ||
| 14 | 9.5x300 | ||
| 15 | 10x300 | ||
| 16 | 10.5x300 | ||
| 17 | 11x300 | ||
| 18 | 11.5x300 | ||
| 19 | 12x300 | ||
| 20 | 12.5x300 | ||
| 21 | 13x300 |
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