A manual chain block is a tool used for lifting and hanging heavy objects. Some manual chain hosts are light and easy to carry, while others have a unique structure that offers high braking performance, etc. The material varies depending on the characteristics, such as stainless steel types suitable for use in food factories, etc., plated body with excellent durability, rust prevention for both body and chain host, aluminum alloy steel for body with emphasis on lightness, etc. In addition, the constant load also differs for each type. Some can be lifted up to 250 kg, others up to 5 tons and there are a wide variety of products. Therefore, it is necessary to select a chain host suitable for the weight of heavy objects.