These kits are designed for tyers that have mastered the basic fly tying lessons and are ready to tie their own flies. This kit comes with all the materials needed to tie 50 flies (in trout sizes 12, 14) and includes a material list so you can restock when needed, fly tying instructions, and a picture of the finished fly. The Mr. Rapidan Soft Hackle Nymph is very productive for the mountain trout streams in the spring time. I use this fly as a dropper on many of my trout streams. This fly can also be used for smallmouth bass fishing if you tie it on a size 6 or 8 size hook.