Size of Double-ended ring spanner
| Metric Size | Length, mm | SAE Size | Length, mm |
| 6 x 7 | 167 | 1 / 4" x 5 / 16" | 167 |
| 8 x 9 | 183 | 5 / 16" x 3 / 8" | 183 |
| 8 x 10 | 183 | ||
| 10 x 11 | 198 | 3 / 8" x 7 / 16" | 198 |
| 10 x 12 | 198 | ||
| 11 x 13 | 218 | 7 / 16" x 1 / 2" | 218 |
| 12 x 13 | 218 | ||
| 12 x 14 | 218 | 1 / 2" x 9 / 16" | 218 |
| 14 x 15 | 240 | 9 / 16" x 5 / 8" | 240 |
| 14 x 17 | 260 | ||
| 16 x 17 | 260 | 5 / 8" x 11 / 16" | 260 |
| 17 x 19 | 292 | 11 / 16" x 3 / 4" | 292 |
| 18 x 19 | 292 | ||
| 19 x 21 | 318 | 3 / 4" x 7 / 8" | 318 |
| 19 x 22 | 318 | 13 / 16" x 7 / 8" | 318 |
| 20 x 22 | 318 | ||
| 21 x 23 | 330 | 7 / 8" x 15 / 16" | 330 |
| 22 x 24 | 330 | ||
| 23 x 26 | 346 | 15 / 16" x 1" | 346 |
| 24 x 26 | 346 | 15 / 16" x 1 -1 / 16" | 346 |
| 24 x 27 | 346 | ||
| 25 x 28 | 355 | 1" x 1 - 1 / 8" | 355 |
| 27 x 32 | 366 | ||
| 30 x 32 | 372 | 1 - 1 / 8" x 1 - 1 / 4" | 372 |
| Spec | |
| Type | Box End Wrench |
| Finish | Mirror Finish/ Matt Finish |
| Material | Chrome Vanadium Steel |
| Panel Type | Flat Panel / Sunk Panel |