Using the Greenlee 39298 breakaway swivel is easy. First, make sure to pair it with the appropriate breakaway pins. Connect it to your cable setup where protection is needed. The swivel will act as a safety measure, breaking away when the load reaches the preset level. When it breaks, you can replace the breakaway pins to adjust the breakaway value as per your requirements. As for maintenance, keep it clean and check the pins regularly for any signs of wear. If the pins are damaged or worn out, replace them promptly to ensure the proper functioning of the swivel. Also, store it in a dry place when not in use to prevent rust and other damage.