Harken 57mm Cheek Ratchamatic® Block Dinghy Maximum working load (kg)2209 kg

Maximum working load (kg)2209 kg

high-gloss finish repels water to reduce drag for ultra-fast results

Maximum working load (lb)900 lb

lightweight head foils offer significant advancements over the weaker PVC materials used by other manufacturers

Breaking load (lb)1620 lb

Harken 57mm Cheek Ratchamatic® Block Dinghy Maximum working load (kg)2209 kgPart No. 2633 Sheave (mm)57 mm Sheave (in)2 1 4 in Maximum line (mm)10 mm Maximum line (in)3 8 in Maximum working load (kg)227 kg Maximum working load (lb)500 lb The Carbo Ratchamatic is a load sensing ratchet block that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase. Shifting between ratchet and light air modes is seamless.