These tiny ice pick bails have a small loop at the top, and are for hanging a 1-hole bead or small pendant (for example a 10mm Swarovski heart bead) from an earring or necklace.
Line up the little 'ice pick' prongs with the holes in the bead then give a gentle squeeze with your fingers so that the prongs both go inside the hole of the bead. Then gently give a further squeeze with the flat pliers just to ensure it is closed safely.Don't squeeze where the bead is, squeeze the metal above the bead. Gently!
This finding works similar to a triangle jumpring, but it is just a little prettier!