Chain block is called chain hoist, hand-drive block, it is a kind of manual lifting machinery. It is suitable for small devices and short distance lifting of the objects. Its lifting capacity will normally be less than 100T. The outer shell of the chain block is high quality alloy steel which is strong wear-resistant and high safe efficiency. Pull the manual chain clockwise when the chain block lifting up. Pull the manual chain anticlockwise when lifting down, the brake seat and the brake block will be separated, the ratchet wheel is motionless under the function of the detent, five teeth long axis drives the lifting chain wheel to rotate in the oppsite direction, so the heavy object drops steadily. Ulide chain block has the characteristics of safety and reliability, simple maintenance, high mechanical efficiency, small pull force, light and easy to carry, good-looking appearance, small size, wear well. Its maximum load up to 100t and its minimum load up to 250kg.