You can work harden it - sort of, but it's copper based, so it will never harden the same way sterling silver will. Artistic Wire tends to be always on the soft side no matter how much you work it or whack it.
The switch knot is a decorative lacy macrame/ hemp jewelry knot that helps you save on twine too. This tutorial shows you how to tie one with clear pictures and instructions.
A sliding knot is a wonderfully easy way to end off a leather, string, hemp, or corded necklace or bracelet. It looks neat and stylish, is a very practical closure, and is very easy to make.