High Quality HSS Titanium Coated Twist Drill Step Drill Bit Made in China

| Optional | Key Features |
| HSS/Cobalt-HSS optional,M2,M35 best quality | High Speed Steel for long tool life and extra durability |
| Tin-coated/uncoated optional | Up to 14 conventional drill sizes on one tool |
| Single/Two/Three flutes optional | Drills material up to 10mm thick |
| Straight/Round/Spiral flutes optional | Non-slip point needs no center punch |
| Round/Three Flat/Quick Release shank optional | Enlarge existing holes |
Specification:
| 1.Material | HSS M42,M35,6542(M2),9341,4341,4241 |
| 2.Finish | Tin coated,coffee,bright,rainbow colour,Black oxide,Black flute & bright shank |
| 3.Process | Roll forged,edge ground,fully ground |
| 4.Standard: | DIN 338 (jobber series) DIN 340 (long series) DIN 1897 (stub series) |
| 5.Diameter | 4mm-39mm |
| 6.Advantages | Flatted shank prevents slippage in three jaw chuck Advanced equipment and technology Quality guaranteed |
| 7.point angle | 118 degree,135 degree split point |
| 8.certification | ISO9001 |
Size:
| Item NO. | Specification | Steps | Shank Size |
| 1 | 4-12 | 5 | 6mm |
| 2 | 4-12 | 9 | 6mm |
| 3 | 4-20 | 9 | 8mm |
| 4 | 6-18 | 7 | 8mm |
| 5 | 6-20 | 8 | 8mm |
| 6 | 4-22 | 10 | 8mm |
| 7 | 4-30 | 14 | 10mm |
| 8 | 6-30 | 13 | 10mm |
| 9 | 4-32 | 15 | 10mm |
| 10 | 6-35 | 13 | 10mm |
| 11 | 4-39 | 13 | 10/13mm |
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