1. According to the use requirements, please choose the appropriate rotating rings, do not exceed the rated load. 2. Tap the screw hole on the workpiece so that the lifting ring bolt is installed vertically on the surface of the workpiece. The thread hole should be drilled to avoid the crown thread being enlarged when the lifting ring is twisted. The surface of the workpiece must be smooth, so that the ring washer and the surface of the workpiece in full contact, there should be no gap in the middle. Do not install gasket between ring washer and workpiece surface. After installation, the side of the ring U-bolt shall not touch the suspended object or other objects. 3. When lifting, please apply load at uniform speed, gradually add force, do not apply impact load and vibration load.

4. The rotating rings are not suitable for high-speed rotation under full load.