1. When selecting, it is necessary to see whether the surface of the device in contact with the cable is smooth. To avoid large abrasion of the cable during use, which may lead to the cable being easily broken and unable to be used for a long time.
2. Observe the steel parts except for the body and pin shaft. Generally speaking, there is no problem with the fairlead roller in the body and pin shaft structure. Therefore, it is suggested that when selecting the device, we should focus on other steel parts, especially paying attention to whether the steel parts other than the body and pin shaft have been galvanized or painted.
https://www.ysmarines.com/articles/what-is-the-roller-fairlead-and-how-to-select-the-best-manufacturer/
