Northrock Heavy Duty core and rubber casing assembly. The metal cable is 3/8" in diameter and has 2 square ends 5/16" in diameter. The core inside the casing looks like this:
This is a picture of the casing:
When you replace the drive shaft or casing, follow this guide.
You can print it out. You can also use the guide to troubleshoot any
problems you might have in operation. It is almost always the result of
loose connections or a damaged drive shaft or casing.