The 609-S drum cheeks swivel through 360°, (Turnbuckle version) ensuring safe manoeuvres through a smooth and regular feeding of the tiller rope. Drum and halyard swivel are equipped with Torlon® and Delrin® ball bearings for increased performance and mechanical resistance, for boats from 6 to 9mt. Drum sheet Ø 6,5mm. Supplied complete for 9,55m stay. Max genoa dimensions m² 25mt.