How to Make A Surgeons Knot
A surgeons knot, also called a lock knot, is really easy to make. It's just a square knot with an extra twist. This extra twist gives added friction that helps hold the knot in place until the second crossing is made.
This is a great knot to use with a really slippery cord like Stretch Magic or fishing line, or if you just want to make triple sure that your knot won't come undone.
To make one, start as you would a square knot, adding an extra twist when tying the first throw. Complete the second throw as normal. Tighten the knot.
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