Ronstan Series 55 Orbit Block™, Ratchet with Fiddle, Becket, and Cam Cleat RF56530 Top Coat wheras the "Heavy Duty" version

wheras the "Heavy Duty" version is capable of handling higher loads

the formula leaves a protective barrier on metal surfaces to help prevent future pitting

Ivar Dedekam’s revolutionary approach to sail and rig tuning tackles the practical and realistic elements of tuning your boat as well as the theory of sail aerodynamics

Hood adjustment cord for a secure fit

Ronstan Series 55 Orbit Block™, Ratchet with Fiddle, Becket, and Cam Cleat RF56530 Top Coat wheras the "Heavy Duty" versionUp to 20: 1 holding power Smooth easing of sheets High performance cleating Sheave 55 + 35 mm Max. Rope 10 mm Max. Cable mm Pin 5 mm M. W. L. 250 kg B. L. 750 kg Weight 235 g * Fiddle sheave has a high load full contact bearing (ie. not ball bearing). Main sheave has two stage, ball bearing.