Description: These barrel clasps have a built-in safety screw Lock which is very durable and easy to screw together. They are perfect for repairing your existing jewelry or creating /design homemade jewelry, necklaces, anklets, charm bracelets or any craft / fashion projects with ease. The beautiful and shiny appearance that keeps your jewelry looking brilliant and special. They could fasten the ends of either a necklace or a bracelet together by screwing the two pieces together and forming the barrel shape. 15 pieces mixed color can meet your different need for your crafts projects. Specification: Material:Brass Size Approx.10x5mm/0.4x0.2inch Package Includes: 15 pieces screw type jewelry making clasps