For patterns on hooks from size 18 up to 5/0, Magic Heads will add a swimming action to your flies not easily achieved before. They are soft, lightweight, clear and will not affect the castability of your patterns. With the Magic Head flipped back, it will give you the traditional streamer action during stripping. With the head flipped forward, it brings the fly the liveliest baitfish undulation possible. Flip the head back to tie on your leader, and then leave it back or flip forward for the swimming action to take effect. Works great for leeches, swimming style nymphs, eggs and attractor patterns. 6 heads per package (except for size 1 to 5/0, 4 per package).