When we buy hand -pour gourds, we need to pull the gourd to make a simple understanding, which can help us choose more suitable products. It is a bracelet driver with a chain as a traction part. The characteristics are: small body shape, light weight, simple operation. The driving method is manual without power. No electricity, so the scope of applications is wider. The main body of the gourd is divided into alloy steel, stainless steel, copper alloy and other materials according to different categories. The accessories use different materials with different materials according to the requirements. For example: hooks, chains, sprockets, gears, short shafts, etc. Metal steel types are more common on the market and are suitable for conventional lifting environments. The copper alloy type uses special flowerless materials, and is mostly used in the environment of gas, dust and other environments that are easy to explode. Stainless steel types are mostly used for food, chemical industry and other environments. According to the different origin of the place of origin, the domestic hand -pulling gourd and the imported hand stretch gourd. According to the appearance, it can be divided into: round and triangular type. There is also a difference, size, and quantity of domestic gourd manufacturers based on different materials or materials. Make different models of products according to different quality. For example: "HS-C, HS-A, HS-T, VT, etc." Small figures have large power ", the specifications are mostly based on the load weight, and the independent unit is mostly tons. Then according to the length of the traction chain, the unit is rice. After learning about this, I have a simple understanding of it. When you buy, you will not face all kinds of styles. Determine your own needs, use the environment, start weight, rise height, and clear your goals. It is easy to buy the applicable hand stub.