Greg Senyo is a prominent steelhead and salmon expert who has designed many leading fly tying materials. 

Senyo’s Micro Shank is a smaller, lighter version of the popular Senyo’s Articulated Shank, and is a simple, versatile solution for tying a variety of small, articulated flies such as petite trout wet flies, low-water steelhead flies, sparse streamer designs, and small traditional salmon flies. The wire diameter is small enough to directly attach to hooks as small as size #10. 

The ultralight, slim, and strong shank also offers a new option for tying surface flies and brings a high degree of realistic, articulated movement to small fly design.

Quantity per pack: 25 shanks

https://www.youtube.com/watch?v=ikLQSX1QsEs