A stainless steel hand chain block is a manual lifting device made of stainless steel material, which features rust and corrosion resistance, making it suitable for humid environments (such as the marine industry, food processing, etc.). The main components (such as chains, hooks, and housings) are made of 304 stainless steel for rust prevention. It operates by driving internal gears with a hand lever handle without the need for electricity, making it ideal for use in places without power or outdoors. Although it is made of stainless steel, it still requires anti-corrosion lubricating oil to maintain the gears and chains. Handle idling: Check if the gears are worn. Chain jamming: Clean foreign objects and lubricate.