Hook & Hackle " Switch 101's " Fly Lines We designed two fly lines for the “Switch Rod” folks. During our tests,we found folks that could cast or shoot the entire line in one cast. The 400 grain line is an absolutely DREAM MATCH with our Xi 10’6” 8weight switch rod blank! The 350 grain line is a terrific match on the Batson Switch rod blanks, 6 or 7 weight. 37’ heads and 64’ running lines. Head is Sky Blue and running line is chartreuse.