Steel abrasive is like sandpaper, but made out of small pieces of steel. Imagine if you rubbed a piece of sandpaper against a piece of wood, it would take off the rough parts and make it smooth. Steel abrasive does the same thing, but it's even stronger and more effective.
Steel abrasive can be used to clean and polish metal surfaces, remove rust and paint, and even shape metal. People use it in factories to make things like cars and appliances.
However, steel abrasive can be dangerous if not used carefully. Just like sandpaper can scratch your skin, steel abrasive can also cause cuts and scrapes. That's why it's important to wear protective clothing and follow safety guidelines when using it.