1.Fast and accurate drilling results is designed.
2.The drill bit has a short flute and overall length to enhance rigidity during drilling operations.
3.A self-centering 135° split point design, ensure that the drill does not wander or "walk" during the drilling process.
| HSS straight shank twist drill bits | |||
| Diameter(D) | Inch（decimal） | Flute Length(F) | Overall Length(L) |
| 2.60 | .1024 | 9.50 | 43 |
| 2.70 | .1063 | 10.60 | 46 |
| 2.80 | .1102 | 10.60 | 46 |
| 2.90 | .1142 | 10.60 | 46 |
| 3.00 | .1181 | 10.60 | 46 |
| 3.10 | .1220 | 11.20 | 49 |
| 3.20 | .1260 | 11.20 | 49 |
| 3.30 | .1299 | 11.20 | 49 |
| Metric Double End Twist Drill Bits | ||
| Diameter(D) | Flute Length(F) | Overall Length(L) |
| 3/32 | 9/16 | 1-3/4 |
| 7/64 | 5/8 | 1-15/16 |
| 1/8 | 5/8 | 1-15/16 |
| 9/64 | 5/8 | 2 |
| 5/32 | 5/8 | 2-1/8 |
| 3/16 | 5/8 | 2-5/16 |
| 7/32 | 3/4 | 2-9/16 |
| 1/4 | 13/16 | 2-5/8 |
| Metric Double End Twist Drill Bits-Number | ||
| Diameter(D) | Flute Length(F) | Overall Length(L) |
| #10 | 5/8 | 2-5/16 |
| #11 | 5/8 | 2-5/16 |
| #20 | 5/8 | 2-1/8 |
| #30 | 5/8 | 2 |
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