Easy operation mechanism: Adjust the up and down switch to the required position, then simply turn the hand wheel to tension the chain for efficient lifting work. Safety-first design: Forged from alloy steel, the hook is designed to slowly deform under overload, providing reliability and safety when operating with the lever hoist for lifting heavy loads. High-strength lifting chain: Made of G80 manganese steel, the lifting chain delivers exceptional toughness and strength for lasting performance in diverse lifting tasks with this manual block. Position adjustment function: The chain drop guard ring prevents the chain from being pulled out during adjustments and allows seamless repositioning of the hook when using the pulley system. Use scenarios: - In a workshop, lifting and positioning heavy machine components during installation. - At construction sites, safely lifting and positioning heavy materials for assembly or maintenance. - In warehouses or manufacturing lines, repositioning loads precisely using a pulley system.