Torx Driver is a 6 point star. Torx is the registered trademark of Textron Fastening Systems, all rights reserved. Torx size is measured across opposite tips of the star. Security Torx driver has a hole drilled in the tip, available for size T9 and above. See below for Torx sizes in mm:
| T5 |
1.42 |
T8 |
2.31 |
T15 |
3.27 |
T27 |
4.99 |
| T6 |
1.70 |
T9 |
2.50 |
T20 |
3.86 |
T30 |
5.52 |
| T7 |
1.99 |
T10 |
2.74 |
T25 |
4.43 |
T40 |
6.65 |
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