Halyard restrainers prevent the halyard from wrapping around the foil on boats where the swivel isn’t mounted near the masthead. Use with furling unit 00AL, 0, 1, 1.5 Sheave Ø (mm) 25 mm Sheave Ø (in) 15/16 in Weight (g) 85 g Weight (oz) 3 oz Fasteners (mm) 5 RH mm Fasteners (in) #10 RH in Use with furling unit 00AL, 0, 1, 1.5 Use with 00AL/0/1