Quick-and-simple to tie, this latest innovation in fly tying offers fly fishermen an exciting alternative to using old-style dumbbells or cones to weight their flies. The Fish-SkullTM has unique design features making it a very versatile platform for tying a wide variety of realistic, weighted streamer patterns using natural or synthetic fly tying materials. * SMALL for hook sizes typically #8, #6, #21 * SMALL-MEDIUM for hook sizes typically #4, #2, #18 * MEDIUM for hook sizes typically #2, #1, #1/17 * LARGE for hook sizes typically #2/0, #3/0, #4/17