The 1B Combination Spanners combine a precision open end and offset ring end for efficient tightening and loosening of nuts and bolts.
Specifications:
| No. | Size (mm) | Length (mm) | No. | Size (mm) | Length (mm) | No. | Size (mm) | Length (mm) |
| 1B5 | 5 | 100 | 1B18 | 18 | 245 | 1B33 | 33 | 412 |
| 1B5.5 | 5,5 | 100 | 1B19 | 19 | 258 | 1B34 | 34 | 412 |
| 1B6 | 6 | 100 | 1B20 | 20 | 270 | 1B36 | 36 | 460 |
| 1B7 | 7 | 112 | 1B21 | 21 | 280 | 1B38 | 38 | 460 |
| 1B8 | 8 | 125 | 1B22 | 22 | 292 | 1B41 | 41 | 520 |
| 1B9 | 9 | 138 | 1B23 | 23 | 305 | 1B46 | 46 | 550 |
| 1B10 | 10 | 148 | 1B24 | 24 | 318 | 1B50 | 50 | 580 |
| 1B11 | 11 | 158 | 1B25 | 25 | 328 | 1B55 | 55 | 620 |
| 1B12 | 12 | 168 | 1B26 | 26 | 340 | 1B60 | 60 | 660 |
| 1B13 | 13 | 185 | 1B27 | 27 | 352 | 1B65 | 65 | 710 |
| 1B14 | 14 | 198 | 1B28 | 28 | 370 | 1B70 | 70 | 760 |
| 1B15 | 15 | 210 | 1B29 | 29 | 370 | 1B75 | 75 | 810 |
| 1B16 | 16 | 220 | 1B30 | 30 | 390 | 1B80 | 80 | 860 |
| 1B17 | 17 | 232 | 1B32 | 32 | 412 |