Make a "O" with your round nose pliers as shown
Now take the long wire and make a spiral under the "O" (loop)
Cut the remaining wire sticking out
It will look like this
Now stick the nose pliers in the loop and begin to pul the spiral
They will look like this!!!
Now glue the bead cap to your marble & let it dry for 2 hours (or 1Day EVEN BETTER!)
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