I used it around my mobile strap and around a metal rod attached to my car key. - ie Rod could be used incase of an emergency to smash window.
In this guide I am showing the steps how to create the square knot.
Step 7- insert the inner cord into the first square knot and tight it around.
Step 13-cut and fuse 2 loose ends.
Step 14- create decorative knot or fuse it.