Jump Ring Sizes: Includes a large number of 4mm, 5mm, 6mm, 7mm, and 8mm jump rings. Various sizes perfectly meet your crafting needs. Packaging Includes: Comes with a box of 1200 jump rings and clasps, a brass jump ring opening tool, a pair of bent nose pliers, and a bent tweezer, making it a practical set for necklace repair and crafting. Easy Storage: Packaged in a 12-compartment storage box, keeping small jump rings neatly in the correct positions, avoiding clutter, easy to find, convenient to carry and use. Practical Tool: Easy to use; simply hold one end of the jump ring with pliers, insert the other end into the gap of the jump ring in your hand, and use both hands to move in opposite directions to open/close the jump ring. Wide Application: Perfect for making jewelry, excellent for necklaces, bracelets, and earrings; suitable not only for crafting but also for repairing jewelry, crafts, and more.