What does “hook and a draw” mean in the Johnny Yuma TV theme song?

Jim & Jan Patton

Anthem, Arizona

I first sang that Johnny Cash song at college parties in the late 1950s: “He packed no star, As he wandered far, Where the only law, Was a hook and a draw, The rebel, Johnny Yuma.”

In this case, Johnny Yuma, played by the late Nick Adams in the 1959-61 ABC series The Rebel, had a wicked hook—either left or right fist—and he could draw his six-gun as quick as a cat.