Lead wire is used to weigh down...

Lead wire

Lead wire is used to weigh down nymphs and wets nymphs. It is tie on the hook by winding, forming a sub-body that will then be covered by the fly tying material. Often used in combination with tungsten beads, this allows you to get a very heavy nymph without having to oversize the beads, with the risk of making the silhouette of your dressing out of proportion. Flat lead wire is often used to weigh down small wets nymphs without a tungsten beads.