All made of stainless steel material, lead-free,strong and durable, great for hypoallergenic, comfortable to wear, growing in popularity among new types of jewelry,friendly to your sensitive hand or necklace. 4 Colors: It contains 4 colors unique twisted jump rings for jewelry construction,golden, rose gold, silver and stainless steel color, the assortment of colors made it easy to match up with different projects, suit for you daily use. Hypoallergenic Material: These stainless steel open rings are made of high quality stainless steel material with excellent workmanship, sturdy and durable, long service life, looks more glossy and of textural quality. Package Include: Jump rings comes with 48 pieces jump rings, each color is 12pcs,18 Gauge, 8mm in diameter,convenient for your daily use and storage, includes all you need for jewelry making supplies. Easy To Use: You can operate these jumpers with jewelry pliers. The opening of the jumper can be opened with a little effort. Add the parts you need to connect, then close the jumper. Perfect For Jewelry Making: The open jump rings set are suitable for many projects like linking small chain and earrings, making bracelets, repair necklaces, making chain mail and other jewelry related projects.