Ronstan Stay Adjusters Complementary Hardware_Spinnaker Pole Cars Harken's 29mm Carbo Blocks are

Harken's 29mm Carbo Blocks are great for use as a mainsheet on small dinghies such as the Optimist

white = counter-clockwise rotation

Compare them to plain bearing blocks from competitors

Schaefer 300 series furling blocks offer unique

To fine-tune or to trim using a higher purchase

Ronstan Stay Adjusters Complementary Hardware_Spinnaker Pole Cars Harken's 29mm Carbo Blocks areChannel Style Stay Adjusters Type 316 Stainless Steel These stay adjusters are typically used on dinghies, catamarans and small keelboats and serve to greatly reduce the risk of losing a stay when adjusting rig tension. Each has a unique retaining system with fast pin for rapid and calibrated adjustment over its specified range. Sold individually