Gunmetal plated brass for 4mm rhinestone chain. Fits our Czech glass rhinestone chain. Gunmetal chain works great for a wide variety of mixed-metal and fashion jewelry. No soldering necessary. Just slip this chain end under the last rhinestone link of your rhinestone chain, and use jewelry pliers to fold the prongs over the edges of the stone. Use jump rings to attach other jewelry findings. Gunmetal color may vary.