Our company does not use solder therefore, we have had to be
creative in finishing jewelry with hand made wire clasps and figure
8 as a jump ring.
You could bend a small end of the rubber cord, wrap wire around it
tightly, wire from bottom up, lift the wire, slide chain large
enough to be grabbed by a hook or flat lobster claw clasp, then
make a figure end with the wire ending in the center of the figure
eight, pressed down smoothly so no one gets a poke or cut. From your
wire, allow the extra chain you select just to hang down in the back
for whatever length you need as an extension.
Use a medium size flat lobster claw, remove the O ring, and slide
wire through the end, enough wire to match the other side. You can
finish both sides in this manner, but it may look a bit off. If you
make a 16" necklace with a 3" chain extension plus the length of the
clasp, you should nearly a 20" finished product.
The holes in the chain are the links the customer will select for
the length that he or she desires. This can also apply to any type
of multiple threads knotted at intervals, cords, rat tail (but that
frays too easily), and braided leather cords.
If you would like, write to me off line and I will try to inform you
or sketch a design, scan it, and attach it to the e-mail file for
you to see. Just let me know if you need any more help and I will be
happy to assist you. Take care and good luck.