Harken Classic Block Single 001 2.25″.The classic Harken dinghy block is designed for 10mm rope with one plastic sheave.The Harken 2.25″ (57 mm) block is compact and lightweight, with fast trim and release under high or low loads. Perfect for dinghies, scows, beach cats, and iceboats, as well as small offshore racers and cruisers.Delrin ball bearings, sheave, and sideplates are UV stabilized with carbon black for maximum protection.Use forMain and jib sheetsSpinnaker halyardsControl linesSpecificationsSheave diameter: 2 1/4″ (57 mm)Length: 4 1/4″ (108 mm)Weight: 4.5 oz. (128 g)Maximum line diameter: 7/16″ (12 mm)Shackle pin diameter: 3/16″ (5 mm)Maximum working load: 500 lb (227kg)Breaking load: 2500 lb (1134kg)Use with furling unit: 3, 3.25