The extension cables from Prime-Line are made from galvanized carbon steel offering superior strength and lasting durability. The 1/8 inch diameter cable is intended to replace most wooden garage door safety cables and provides your garage area with an added measure of safety should your extension springs ever break.
Galvanized carbon steel aircraft cables used on extension spring doors
1/8 inch replaces most wood doors
3/32 inch replaces most fiberglass and aluminum doors