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1. A connector has first and second closable jaws, each jaw is adapted to close around an item or unit, the jaws are connected together by way of a bar, at least one of the jaws is rotatable with respect to the bar and has a twist lock closure means which comprises two relatively rotatable parts which when rotated in a first direction engages a lock means and prevents the jaws from opening by arresting a ratchet and pinion in place, and when rotated in an opposite direction unlocks the jaws; wherein the jaws are sprung apart by a resilient means which includes at least one O-ring which, when in a relaxed, unstretched state retains the jaws in an open configuration.
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