Description: Package: 2 pieces jump rings opening closing tools, each inner diameter is 18mm/0.71inch, outer diameter is 21mm/0.83inch. Material: The opening closing rings tools are made of stainless steel material, durable and sturdy, not easy to break or deform, durable for a long time. Protecting your fingers and increasing strength, great tool for jewelry makers. Design: Our jump rings opener is designed with 4 grooves, easy for you to open or close the jump rings. You can also wear it on your hand as a decorative ring, bring you an exquisite effect. Easy to Use: Place the jump ring tool on one finger and grasp the side of your jump ring with a pair of pliers, then slip the closed part of the jump ring into the slot on the tool which offers the best fit, gently twist the jump ring sideways with the pliers to open it, and then twist it closed with the pliers. Multiple Function: The jump rings opening tools are perfect for jewelry making, jump ring opening and closing, necklace repairing, etc. Specification: Material: Stainless Steel Size Chart: Inner Diameter: 18mm/0.71inch Outer Diameter: 21mm/0.83inch Package Includes: 2 Pieces Jump Ring Opening Closing Tool Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!