| GRAB HOOK: Grade 80, forged alloy steel, heat treated. Cradle design permits use of full chain capacity. Forged — Quenched and Tempered, Proper design, careful forging, and precision controlled quench and tempering gives maximum strength without excessive weight and bulk Load rating codes stamped on each hook. 322 Swivel Hooks use the same load rating code as 319 Shank Hooks. Hooks 320 hooks331 hooks319 hooks323, Self-locking hook Designed with Engineered Flat to connect to Grade 80 chain fittings |