This fast and easy knot (the Blood Knot) allows you to avoid wasting time switching out line. You can quickly join two lines together in a matter of a minute.

Used for joining two lines together, the Blood Knot is a tried and true fishing knot and a favorite of fly fishermen. The strength of the knot is increased by making at least 5 and up to 7 wraps on each side of the knot. It works best with lines of approximately equal diameter. 

Line up the ends of each line together for several inches, then wrap the first line around the second at least five times.

Wrap the second around the first at least five times and bring both loose ends back to the middle between the two lines.

Pull tight on each line until the knot is snug.