These small 3mm crystal beads have a .8mm hole with a rounded edge to reduce wear on your stringing material. These crystal glass beads are perfect for dash of color in a necklace design or bracelet project Swarovski's brand of Austrian crystal is famed for its precision shape and brilliant color. The Jet Bicone Bead offers strength in its rich, pure black apperance reflecting light and sparkle. Adding these Swarovski Bicone Beads to your next jewelry project creates an unmistakable sign of authenticity and elegance.