Stonfo Hook and Hackle Gauge helps to choose the hackle or hook size quickly and easily. Just bend an hackle around the plastic pin and read the appropriate hook size on the curved scale. The graphic clearly indicates the sizes of the hooks from 4 to 22 and the colors of the curved scale allow a good view with both light and dark hackles. It can be applied directly to the vise stem and can be rotated when not in use.
