Precision-made and custom-designed needles for the manufacture of extended foam bodies, including mayflies, emergers and nymphs. Easy to use and you easily adjust the thickness and length yourself. The well-crafted design and shape differ significantly from traditional needles that are often straight and provides to thick bodies. J: Son's pins allows you to tie the body directly to the pin. Once the body is ready-made, you can easily adjust how much you want it to bend by dragging or lining the thread.