Feature●Size: about 12 x 4mm/0.47 x 0.16inch, hole diameter: 1mm/0.04inch, totally 50 sets brass screw clasps.●These barrel/beads clasps have a built-in safety screw Lock which is very durable and easy to screw together.●These jewelry clasps fastens the ends of either a necklace or a bracelet together by screwing two pieces together that form a shape of a barrel.●Have a beautiful and shinning appearance that keeps your jewelry looking brilliant.●Screw clasps are perfect for repairing your existing jewelry or creating homemade jewelry, necklaces, anklets, charm bracelets or any crafts.Description