Double arms elastic safety tether for improving the safety during sailboat racing.The shortest arm extends from 46 cm (18") to 91 cm (36"), the longest extends from 104cm (41") to 183cm (72").These safety tethers incorporate two lightweight aluminum double-action safety hooks, built-in stress indicator and welded O-ring for improved security offshore, whether racing or cruising. The stress indicator features a bright overload flag that is exposed when the tether is stressed to the point of needing replacement (about 900lb. of force triggers the flag).The boat-end aluminum safety hooks have an easy-to-use double-action gate that automatically locks closed, so it wonÕt accidentally release from attachment points. Yet, itÕs extremely easy to open in one ergonomic movement without pinching your hands. Internal elastic retracts when not under load, staying out of the way. Nonmagnetic, stainless-steel snap shackle at chest releases from the harness under load. Certified for only one user.High quality product completely made in Italy.