If you need a sturdy, super strong knot, but you want be able to reuse the rope, then the bowline knot is what you want. The bowline knot is one of the strongest knots available. It's a nonbinding knot which makes a nonslipping and nonjamming loop at the end of the rope. This is perfect for heavy equipment, and great for boats and other watercraft vehicles. The bowline can take as much weight as the rope can handle, and it can be untied!