Create stunning jewellery designs with beads unlimited black antique bolt rings use these handy rings for necklace fastenings allowing you to make personalised chains effortlessly with this ideal fastening solution these bolt rings are easy to attach to your chain with a loop to thread through and will fasten securely so that you can wear your designs with confidence they are black antique so will go best with black chains and coloured threads or twines size 6 mm16 packblack antique bolt