Garage door torsion cables are a vital part of the mechanics of the door. The cables hold the tension from the springs and connect to the bottom brackets on both sides of the garage door. These cables are for an 8ft tall door on standard torsion and 12 or 15" radius.
Cables should be free from wear for safe operation of the garage door. If you are experiencing any form of unraveling or fraying it is recommended to replace them.
This is very dangerous so please be careful when working with the cables. They are under extreme tension and could cause you harm or even death.