Accuracy : ± 4%
| MODEL | Driver | Capacity | Length | Net Weight | |
| mm | Nm | ft-lb | mm | kg | |
| OP-1708AK | 9 x 12 | 6-30 | 50-250inch-lb | 290 | 0.58 |
| OP-1709AKA | 9 x 12 | 12-60 | 9-45 | 370 | 0.8 |
| OP-1709AKB | 14 x 18 | 12-60 | 9-45 | 375 | 0.81 |
| OP-1710AKA | 9 x 12 | 20-100 | 15-75 | 400 | 1.14 |
| OP-1710AKB | 14 x 18 | 20-100 | 15-75 | 405 | 1.15 |
| OP-1718AK | 14 x 18 | 40-200 | 30-150 | 500 | 1.38 |
| OP-1720AK | 14 x 18 | 60-320 | 575 | 1.5 | |
| OP-1721AK | 14 x 18 | 50-230 | 575 | 1.5 | |
