Is it a hare's ear? Or a woolly bugger? Maybe its a crayfish? At the end of the day, it's big, it's nasty and it catches fish - bass, trout, carp, panfish - anything that likes a big buggy meal.
A minimum quantity of 2 flies of the same size has been set for this item due to the staff time and labour it takes to fulfill fly orders. In our experience it's always nice to have a spare if you happen to lose one on a rock or tree branch too!