The Stopper Knot is a better alternative to the much more commonly used knot for a stopper, the Figure of Eight knot.

It’s advantages over the Figure of Eight are:

• It doesn’t easily shake out.
• It’s easy to untie.
• It produces a bigger stop.
• It presents a flatter face so it doesn’t get drawn into blocks.  

It’s mainly used on sheets and halyard to provide a stopper so the line won’t run through a block, clutch cleat or jammer accidentally.