Beside creating a pivot point for stiff rigs the ring swivel serves as a massive advantage to most rigs, it allows the hooklink to lay flat against the rig tube or leadcore during the cast, this dramatically reduces the risk of a tangle, it sounds far fetched but it's true.
They now come in the dull grey finish as well, another little edge bearing in mind we have seen from our underwater filming that carp are frightened by the 'glint' of a swivel or hook on the lake bed in clear shallow water when the sun is out.
8 per packet.