ZEC INDUSTRY CO.,LTD
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* made of high speed steel with brad point and 2 shouldered cutting spurs.
* a much longer cutting life than high carbon steel wood bits.
* the choice for serious woodworkers.
* for drilling accurate, splinter-free holes in soft wood, hard wood, plywood and hardboard.
| Metric System | ||
| Diameter | Overall Length | Shank Diameter |
| 3 | 60 | 3 |
| 4 | 75 | 4 |
| 5 | 85 | 5 |
| 5.5 | 85 | 5.5 |
| 6 | 100 | 6 |
| 6.5 | 100 | 6.5 |
| 7 | 120 | 7 |
| 8 | 120 | 8 |
| 9 | 120 | 9 |
| 10 | 120 | 10 |
| 11 | 150 | 10 |
| 12 | 150 | 10 |
| 13 | 150 | 10 |
| British System | |||
| Diameter | Overall Length | Shank Diameter | |
| 1/8" | 2-23/64" | 1/8" | |
| 5/32" | 2-61/64" | 5/32" | |
| 3/16" | 3-11/64" | 3/16" | |
| 7/32" | 3-11/32" | 7/32" | |
| 1/4" | 3-15/16" | 1/4" | |
| 9/32" | 3-15/16" | 9/32" | |
| 5/16" | 4-47/64" | 5/16" | |
| 11/32" | 4-47/64" | 11/32" | |
| 3/8" | 4-47/64" | 3/8" | |
| 13/32" | 4-47/64" | 3/8" | |
| 7/16" | 5-29/32" | 3/8" | |
| 15/32" | 5-29/32" | 3/8" | |
| 1/2" | 5-29/32" | 3/8" | |