I recently became aware of a line of high quality Swiss fly fishing and fly tying products by Marc Petitjean. Several of his products are of interest, however what caught my eye was the Magic Head for streamers. This is a simple clear silicone-like cone shaped device that you tie on the hook shank prior to the other tying element
The Marc Petitjean Magic Head will change the way you fish and more importantly will change the way that the trout will react to your flies. With the Magic head in the back position, it allows you to fish your pattern with the normal up and down streamer head action. Then by flipping the head forward it will give your pattern a side to side fish catching action.
The Magic Head comes in hook size as small as size #18 and are available from retailers.