Aluminum Sea Eyes are very cool gizmos to spice up our streamer patterns. The aluminum is relatively light, but these babies are BIG and make a platform to glue in BIG EYES. Everyone knows that flies tied with big eyes attract big ocean predatory fish. Right-on. Why use aluminum, one might ask. Because we want the durability of a metal barbell fly tying eye without too much weight. Too much weight would make these sink too fast or would hurt us even more when we smack a fly into the back of the skipper's head.