The Bobber Stopper Knot is used to limit a sliding bobber to a certain location on your line, which allows you to suspend your hook at a certain depth. This knot slides easily through the rod guides for casting, allowing you to present your bait at depth without worrying about the bobber impeding your cast. Once cast, the bait hits the water and sinks, and the bobber runs up the line until it stops at this knot. The Bobber Stopper Knot works very well well with Dacron fly line backing. Learn how to tie the Bobber Stopper Knot following the 5 easy steps below.