| Brand | Centrode | Material | Carbon steel |
| Name | Hammer boy four in one | surface treatment | Color zinc |
| 标准 | National standard GB/T | Package Description | Plastic bags/cartons |
| Size | Example: M8 (diameter) | ||
| Setting: mm | ||||||
| Specifications | total lenght | Polished rod length | Thread length | Diameter of round head | Height of round head | Specification of matching nut |
| M6 | 52 | 6.8 | 11.5 | 15 | 14 | M6*13 |
| M8 | 56 | 9.7 | 15.3 | 15.6 | 22 | M8*15 |