Whats the reason for using bead tips at the end of necklaces, bracelets or other strung jewelry?
There are two important benefits. Bead tips cover and protect the knot at the end of the necklace — providing a nice professional appearance. And they secure the necklace, so that if the clasp breaks you can remove it from the bead tip and attach a new one. Without the bead tip, the entire necklace might have to be re-strung if there was only a knot around the clasp.