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Widely used in a explosive and flammable place; Removing hex head bolts and nuts, and bolts in deep hole.
| Number | L1 | L | S | Be-Cu | Al-Cu |
| mm | mm | mm | g | g | |
| 263B-1002 | 90 | 205 | 6 | 85 | 81 |
| 263B-1004 | 100 | 215 | 8 | 100 | 85 |
| 263B-1006 | 110 | 225 | 10 | 140 | 130 |
| 263B-1008 | 110 | 237 | 13 | 185 | 172 |
| 263B-1010 | 120 | 247 | 16 | 220 | 205 |
| 263B-1012 | 120 | 247 | 17 | 230 | 218 |
