A60 - 60 mm Automatic Ratchet Block, Cheek, Anti-Clockwise Type B The BBB20 single ball bearing

The BBB20 single ball bearing block with shackle is ideal for trim lines on smaller boats

SWL: 1500 kg

and the forestay must never be less than 10°

see instruction:

L-MAX: 391 mm

A60 - 60 mm Automatic Ratchet Block, Cheek, Anti-Clockwise Type B The BBB20 single ball bearingTECHNICAL FEATURES The block is designed with lightweight Delrin ball bearings and comes with a composite sheave. The Sheave turns freely anti clockwise. When used as a turning block for spinnaker sheet, fit it on port quarter. The sheave automatically changes from free turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in. The switch over point is set using an allen key to adjust a screw inside the sheave.