A: There are several possible explanations. The beads could be too heavy for the wire, or the wrong diameter wire is being used. The beads and wire should "fit," so that you shouldn't be able to pass the wire through the bead a second time. With the correct diameter, the beads shouldn't move too much on the bracelet or necklace. Abrasive bead holes could also cause the wire to break. Use a reamer tool to soften the inside of the hole and round the edges. Crimping too hard could not only break the crimp, but it could weaken the wire against the crimp. A good "hand-shake" pressure is enough to make a strong crimp.