C&F Design Threader Box The C&F Design Threader Box is built for anglers who value efficiency and precision when rigging small flies. Featuring a compact, lightweight design, this fly box comes equipped with integrated fly threaders that make it easy to tie on even the tiniest patterns quickly and accurately. High-density micro-slit foam securely holds flies in place while keeping them neatly organized and accessible. Ideal for anglers who fish with small dry flies or nymphs, the Threader Box takes the frustration out of changing flies on the water, making it an essential tool for serious fly fishers.