These cabochons have two parallel holes and can often be successfully substituted for other 6mm 2-hole beads, like pyramids and tiles. With a domed top and flat bottom, 2-hole cabochons lay smooth against the skin. They are made of Czech Glass, which is known for its high quality and durability. The beads have two 0.8mm holes, making them perfect for bead weaving, stringing, and embroidery. The beads come in a pack of 20 pieces.