Hook-block is used in the block-and-tackle system of drill service trucks for round trip operations in well repair and stimulation. The hook-block is designed for hanging links, elevators and other tools.
| Load capacity, t | 50 |
| Sheave diameter of trough bottom, mm | 520 |
| Rope diameter, mm | 25 |
| Sheaves pin diameter, mm | 120 |
| Mouth diameter of hook center arm, mm | 102 |
| Side link support mouth diameter, mm | 75 |
| Overall dimensions | |
| - Length, mm | 1811 |
| - Width, mm | 652 |
| - Height, mm | 511 |
| Mass, kg | 810 |