That’s steel wire rope / wire cable on a spool
You can see the multiple strands twisted together and it looks like it’s been oiled to prevent rust.
What it’s used for:
Steel wire rope is used anywhere you need to lift, pull, or support heavy loads. It’s way stronger than normal rope.
Common uses:
1. Cranes & Hoists - Main lifting cable for tower cranes, mobile cranes, overhead cranes
2. Winches - On trucks, 4x4s, marine winches, and industrial winches
3. Elevators - The main cables that lift elevator cars
4. Construction - Rigging, slings, guy wires, and tie-downs
5. Mining & Oil/Gas - Drilling rigs, pulling operations
6. Marine - Ship mooring lines, tow lines, fishing gear