Clam Shell end tips, or knot covers, are normally used when you are stringing pearls or other beads on silk or nylon thread. They cover the knots on the ends of the thread so they can't be seen.
First take your string and tie a double overhand knot on one end leaving a half of an inch remaining. Then put the clam shell end tip onto the string and pull the opposite end of the thread through the inside hole of the knot cover so that your knot rests "inside" the clam shell cover.
Close knot cover with pliers.
Then, tie another double overhand knot in the string, using a pair of pliers to the string so that the knot will end up tight against the clam shell end tip.
Now you are ready to string your beads. Once strung, tie a double overhand knot, then put the clam shell end tip onto the string and pull the thread through the outside hole of the knot cover so that your knot rests "outside" the clam shell cover.
Then tie another double overhand knot in the string so that your knot rests "inside" the clam shell cover. Close the clam shell cover with pliers. Trim excess string. Now your are ready to attach your clasp to finish your project.
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