1. The chain encloses the pipe so that the chain shaft enters the bayonet and rotates the handle to rotate the pipe. 2. Protect your life and property, please do not overload it. 3. This product is intended for use only as a rotating pipe, no other purpose. 4. Chain pipe wrenches with specifications of 900mm, 1000mm, 1200mm and 1300mm, the jaws can be rotated 180° for installation. 5. Please pay attention to rust prevention. 6. Product standard as GB1200 Chain Pipe Wrench.