No. 4

Double Overhand Knot

Usage: The Double Overhand Knot is primarily used as a basis for other knots including the first part of the Surgeon's Knot and both sides of a Double Fisherman's Knot. The Strangle Knot is a rearranged Double Overhand Knot made around an object. It is sometimes used to secure items to posts. Stopper Structure: The Double Overhand Knot is an extension of the regular Overhand Knot, but with one additional pass. Strength/Reliability: The Double Overhand Knot is very secure but can be very difficult to untie.