Drag chains are divided into steel drag chains and plastic drag chains. The steel drag chain is made of steel and aluminum, and can be customized. The plastic drag chain is also known as the engineering plastic drag chain or the tank chain. Drag chains can be divided into three types according to the use environment and requirements: bridge type drag chains, fully enclosed drag chains, and semi enclosed drag chains. Rectangular metal hoses, protective sleeves, corrugated pipes, and metal hoses can also be included in drag chain protection and mobile power supply products.