Page 114 - The Pocket Guide to Outdoor Knots

Purpose
This makes a bulkier stopper knot than the basic overhand knot, and is often

preferred for that reason—but note that, contrary to what is often said, it will not

block a larger hole or slot. If a larger knot is required, use Ashley’s stopper knot
(page 29).

Tying
Tie an overhand knot and tuck the working end a second time (figures 1–2). Pull

carefully on both ends at the same time and feel how the two helixing knot parts
tend to unwind, imparting their twist to the single knot part. Encourage this

transformation by twisting both standing parts in opposite directions as shown
(figure 3). Finally pull the knot tight (figure 4). This technique should be

mastered as it is indispensable for other knots that rely upon it.