The 2.25 in (57 mm) blocks are compact and lightweight, with fast trim and release under high or low loads. Perfect for dinghies, scows, beachcats and iceboats, as well as small offshore racers and cruisers. Sheave Ø (mm) 57 mm Sheave Ø (in) 2 1/4 in Length (mm) 127 mm Length (in) 5 in Weight (g) 142 g Weight (oz) 5 oz Maximum line Ø (mm) 12 mm Maximum line Ø (in) 7/16 in Maximum working load (kg) 227 kg Maximum working load (lb) 500 lb Breaking load (lb) 2500 lb Breaking load (kg) 1134 kg Shackle pin Ø (mm) 5 mm Shackle pin Ø (in) 3/16 in