Boat Size Up to 20' (6.1 m) Pin Dia. 1/2" (13 mm), Strap Thick. 1/8" (3 mm), Strap Length 3-3/4" (95 mm), Strap Width 1" (25 mm), Fastners(4), 1/4" RH (5 mm), Weight 3 oz. (85 g) Works with 80-45, 80-46, 80-55 and 80-56.