Pandahall 1Box/600pcs 6x0.7mm Iron Round Jump Rings Open Jumprings Unsoldered Jewelry Making Mixed Color Silver Antique Bronze Platinum Red Copper Gold Black Iron Open Jump Rings Round Unsoldered Mixed 6 Color: Silver+Antique Bronze+Platinum+Red Copper+Gold+Black Size: about 6mm in diameter, 0.7mm thick, about 60g/600pcs/box. Open round jump rings are an integral part of jewelry-making. They hold designs together and will allow you to embellish them in numerous ways. These jump rings feature a versatile round shape and can easily be opened and closed with chain nose pliers. Use it to attach a clasp to chain, create dangles and more. You'll love having this beading basic on hand for all of your projects.