Double arms elastic safety tether for improving the safety during sailboat racing.Aluminum double-action safety hook, built-in stress indicator and stainless steel connectors with express sleeve for improved security offshore, whether racing or cruising.The boat-end aluminum safety hook has an easy-to-use double-action gate that automatically locks closed, so it wonÕt accidentally release from attachmentpoints.Certified for only one user.High quality, made in Italy.