HAND Jewellery Parts DIY Necklace Bracelet Keyring Lobster Claw Clasps - pack of 30 (504-2 Silver 18mm) Pack of 30 Lobster Claw Clasps. Size: 18mm Ideal for making jewellery - necklaces, braclets, keyrings, etc... Lobster claw clasp for easy charm attachment and removal from the bracelet,etc.