Wichard Proline Tether Hook/Loop - Single 2.5' [7037W]Proline Tether Hook Loop Single 2. 5' Features: Tether with 1 double action safety hook Flat webbing 0. 80 m Automatic closing and opening mechanism The Proline generation has been designed to offer you the highest level of safety at sea. Double safety hook: Automatic closing and opening mechanism Wide opening: 26 mm V Nose feature (patented): easy hooking and unhooking High quality elastic webbing: Retro reflective and visible at night Compact and