What are Brass Balls?
Brass Balls are literally brass balls, about 1.5 inches in diameter. They come in their own ball-sack (a velvety sack just the right size to hold 2 balls, with a draw-string to lock the balls in and to be able to affix the ball-sack to your belt-loop). They are also a symbol. Courage is often referred to (in many cultures!) as “having balls” as in testicles. This is surely gender-biased, but it’s a pretty damn solid euphemism and it’s fun, so we’re sticking with it.