Harken Carbo Air Blocks - 57mm Style:2601. Single Swivel with Becket The Rocna is a true

The Rocna is a true multi-purpose anchor that sets and holds in most seabeds

High power

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Durable polycarbonate construction

Harken Carbo Air Blocks - 57mm Style:2601. Single Swivel with Becket The Rocna is a trueCarbo Air Blocks 57mm These smooth running powerful performers make trimming easy, no matter how hard the wind blows. Carbo Air blocks are made of tough reinforced composite in a size and style to fit any system: singles, doubles, triples, quads, and quints; ratchets and fiddles; soft and hard attach; 18 75 mm. Perfect for main, jib and spinnaker sheets on dinghies and sportboats; control lines on boats of all sizes. High strength pivoting lead blocks