Copper steadied on Tuesday, finding support from improved US consumer confidence and robust retail sales, but persistent concerns about Europe's ability to resolve its debt crisis prevented further gains. In the US, benchmark December copper futures finished up 1.55 cents at $3.3760 per lb. Soon-to-be benchmark March copper ended up 1.90 cents at $3.3905 a lb. Both contracts came just short of Monday's one-week highs.