Grade 100 Alloy Steel Four Swivel Safety Hooks Leg Chain Sling (QOG)

This Grade 100 Alloy Steel Four Swivel Safety Hooks Leg Chain Sling (QOG) represents the highest-performance category of multi-leg chain sling assemblies, combining Grade 100 heat-treated alloy steel chain with a large forged master ring and dual-ring connector at the head and individually swiveling safety hooks at each of the four lower terminals — delivering maximum rated capacity, torsion-free operation, and positive load retention for the most demanding overhead lifting applications.

Grade 100 chain provides a 25% higher Working Load Limit per unit weight compared to Grade 80 equivalents, allowing the same rated capacity to be achieved with a lighter assembly — reducing rigging setup time and operator fatigue in high-frequency or remote lifting environments. The dual-ring connector at the top of the sling ensures secure and centered crane hook engagement even with heavy, large-bore master rings.

Each of the four lower swivel safety hooks rotates 360° independently, preventing cumulative twist in any leg during load rotation, crane travel, or repositioning. The safety latch on each hook provides positive load retention compliant with EN 1677-1 requirements. Standard leg lengths from 1 to 4 meters are available, with custom configurations for specialized offshore, wind energy, and heavy industrial projects.

Available in chain diameters from 7 mm to 22 mm with Working Load Limits from 5.6 to 81.5 tonnes at 0° vertical. All components are individually proof-tested and marked to EN 818-4 and EN 1677 standards, with the complete assembly certified to ASME B30.9 and supplied with a full load test certificate, color-coded ID tag, and material traceability records for statutory inspection compliance.