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| Corresponding Rig Type | ZJ40/2250DB | ZJ50/3150DB | ZJ70/4500DB | ZJ90/6750DB |
| Hook type | DG225 | DG315 | DG450 | DG675 |
| Technical Specifications | ||||
| Max. hook load kN | 2250 | 3150 | 4500 | 6750 |
| Main hook Opening size mm | 190 | 220 | 220 | 235 |
| Spring working distance mm | 180 | 200 | 200 | 200 |
| Main hook diameter mm | 160 | 180 | 180 | 228.6 |
| Auxiliary hook diameter mm | 100 | 120 | 120 | 152.4 |
| Outline dimension(L×W×H) mm | 2545×720×750 | 2950×890×883 | 2950×890×883 | 5238×1626×1114 |
| Weight kg | 2180 | 3410 | 3496 | 15876 |
Structural characteristics
1.The shackle for protection of drill pipe joint, a hydraulic buffer device.
2.The main hook is equipped with reliable safety device
3.The main parts of the force are all non - destructive testing
4.The API conforms to the 8C specification, a API marker.