4 Sizes of Jewelry Rings: These open-ended jump ring connectors come in a set of 4 sizes, with ring inner diameters of approximately 2.2/2.8/3.8/4.6mm. The different sizes will meet your different needs. 1200Pcs: You will get 1200pcs silver connecting rings, 300pcs for each size in a plastic container. Ample quantity, enough for you to DIY different jewelry. Stainless Steel Material: The small opening jump rings are made of stainless steel, lightweight, sturdy and durable, not easy to change color. Smooth surface, comfortable to wear and can be used for a long time. Easy to Use: The open design jump rings can be easily closed or reopened with pliers, perfect for beginners or those who like crafting. Widely Applied: These jump rings are a must-have jewelry accessory for making necklaces, bracelets, earrings, anklets, charms or any other DIY crafts. Not only can be used for jewelry making, but also for jewelry repair.