Location is everywhere..... Hook for bones is size 2, 4, or 6.... Thread - tan monocord... White bucktail,rainbow krystal flash and tan bucktail....I will not put directions here because I am assuming all tyers know how to tie the clouser...But this is still in Brown's book and is a bonefish fly... the Book states that this is Lefty Kreh's version of Bob Clouser's fly.