Link Locks make attaching jewellery easy. Just link and lock! Link Locks can attach safety chains, parrot clasps, hollow gold, initials, lockets, crosses, charms, T-bars, keys and more... Secure your precious jewellery with strength. Link Locks - the superior way to join jewellery together. Material: solid 925 sterling silver. Approximate measurement: 4x5.5mm Starting Position: Place your jewellery on the Link Lock just as you would using a jump ring. Step 1: Holding your jewellery press the two ends of the Link Lock together with a pair of pliers to a closed position in the barrel. Step 2: Using a pair of pliers push the flap down to permanently lock the Link Lock. Finished: Your jewellery is now securely joined together without using a solder joint.