The GreenCaddis Threader fly box is the ideal solution for the aggrevation of threading the eyes of small flies with microscopic tippet. Nothing is more frustrating than attempting to switch flies mid-hatch only to spend precious minutes struggling to tie on a fly. Simply preload the flies on the threaders the night before and effortlessly thread those flies on your tippet on the very first try when on the water. It features a 10 rows, each of which utilizes high quality micro-slit foam to lock your flies in place and has the capacity to hold over 250 flies! Fly box comes with four standard threaders, additional threaders are available.