This product uses imported S2 material, vacuum heat treatment, with a hardness HRC ≥ 59. The torque exceeds 70% of the German standard, and the service life is extended by 10 times.
| Prodboct No. | Size | Box/Ctn(pcs) | Goss/Net Weitikg) | Ctn Size|cm) |
| BK-205901 | 1/4″x65mm | 100/1200 | 18/16 | 33×31×21.5 |
| BK-205902 | 1/4″×100mm | 100/1200 | 27/26 | 37×33×21.5 |
| BK-205903 | 1/4″x150mm | 100/1200 | 30/29 | 40×35×23 |
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