steel wool
noun/ˌstiːl ˈwʊl/
/ˌstiːl ˈwʊl/
(British English also wire wool)
[uncountable]- a mass of fine steel threads that you use for cleaning pots and pans, making surfaces smooth, etc.
钢丝球（用以擦洗或磨光） Oxford Collocations DictionarySteel wool is used before these nouns:- pad