10 Pieces Celtic Shield Knot Bail fits 30mm and 40mm Lucky Donut Gunmetal-Tone DIY for Pendants Necklaces Best Amulets Collection. Package Contains 10 pieces. DIY Lucky Donut Bails made from Base Metals. Size: 28 X 8mm. Will Fit 30mm and 40mm Donuts. The Bail Opens and Closes and has 5mm opening to insert Chain Necklace. For Chains Requiring larger opening, it is recommended to remove Jump Ring from Chain, insert it through and then place jump ring back. May be used to Create your Own Lucky Charm, Unique Necklaces or Pendants. Comes with Branded BestAmulets Packaging.