About the Gunnebo 858 Lifting Super Bow Shackle with Safety Bolt:
- U.S Fed. Spec. RR-C-271 Type IVA Class 3, Grade B.
- They are made from high tensile steel, Quenched and tempered, Grade 8.
- All parts are hot dip galvanized, brown colour marking.
- Has a safety factor of 5:1.
- Documentation: Test certificate and traceable 3.1 certificate.