Wiktionary
steel wheel
n. (context poker slang English) The lowest straight flush, ace-2-3-4-5 (all of the same suit).
Usage examples of "steel wheel".
The spoked steel wheel was about a yard in diameter, locked by a chain and pin.
Kendricks flicked open the top of his lighter, an old-style model with a wick, alcohol reservoir and little steel wheel that ground against a flint.
The small steel wheel vibrated in his hands as he steadied up on his new course.